---
title: "Configure the Client"
url: https://docs.catalyst.zoho.com/en/tutorials/hosted-login-app/nodejs/configure-client/
description: "Create a simple Basic or React application using the features of Catalyst Hosted Authentication that provides user sign-up, application login, password reset, and implements sign-in using prevalent federated identity providers."
last_updated: 2026-08-28T07:59:38Z
service: All Services
type: tutorial
related_links:
  - name: "Client Directory Structure"
    url: /en/cli/v1/project-directory-structure/client-directory
---

# Configure the Client

Let’s configure the client component.

**Basic web app**

The [client directory](https://docs.catalyst.zoho.com/en/cli/v1/project-directory-structure/client-directory/) contains:
* The `index.html` file that contains the HTML code for the frontend application
* The `main.css` file that contains the CSS code for the frontend application
* The `main.js` file that contains the JavaScript code
* The `client-package.json` configuration file

We will be coding `index.html` and `main.js`. We will also be making a change in the `client-package.json` to ensure that the homepage of the application is the authenticated page.

We will discuss the code at the end of this section.

> **Note:** Please go through the code provided in this section to make sure you fully understand it.

Copy the code below and paste it into the respective files located in the `client/directory` of your project using an IDE and save the files.

**index.html**

```xml
<!DOCTYPE html>
<html>
<head>
 <title>Profile Information</title>
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" >
 <script src="main.js"></script>
 <script src="https://static.zohocdn.com/catalyst/sdk/js/4.6.2/catalystWebSDK.js"> </script>
 <script src="/__catalyst/sdk/init.js"></script>
 <style>
  .card {
   max-width: 500px;
   margin: auto;
   text-align: center;
   font-family: arial;
   background-color: #a5a4a4;
  }

  .title {
   font-size: 23px;
   color: black;
  }

  button {
   border: none;
   outline: 0;
   display: inline-block;
   padding: 8px;
   color: white;
   background-color: #000;
   text-align: center;
   cursor: pointer;
   width: 50%;
   font-size: 18px;
   border-radius: 8px;
  }

  a {
   text-decoration: none;
   font-size: 22px;
   color: black;
  }

  button:hover,
  a:hover {
   opacity: 0.7;
  }

  body{
   background-color:#a5a4a4;
   font-size: 20px;
   visibility: hidden;
  }
  p{
   font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
   font-size: 10px;
   font-weight: bold;
  }
 </style>
</head>
<body onload="showProfile()">
 <h1 style="text-align:center">User Profile Information</h1>
 <div class="card">
  <img width="200px" height="450px" src="https://cdn2.iconfinder.com/data/icons/user-management/512/profile_settings-512.png" alt="John" style="width:80px;height: 80px;" >
  <p class="title" id="fname"></p>
  <p class="title" id="lname"></p>
  <p class="title"id="mailid" ></p>
  <p class="title"id="tzone" ></p>
  <p class="title"id="ctime" ></p>
  <p><button onclick="logout()">Logout</button></p>
 </div>
</body>
</html>

```

**main.js**

```javascript
function showProfile() {
debugger;
    //The catalyst.auth.isUserAuthenticated() method allows only authenticated users, i.e., the users who are logged in, to access the pages
    //You can load this method in the body of your page to allow only authenticated users to access a particular page
    catalyst.auth.isUserAuthenticated().then(result => {

        //If the user is logged in, these contents of the page will be displayed to the user
        document.body.style.visibility = "visible";
        const first_name = "First Name: " + result.content.first_name;
        document.getElementById("fname").innerHTML = first_name;
        const last_name = "Last Name: " + result.content.last_name;
        document.getElementById("lname").innerHTML = last_name;
        const mailid = "Email Address: " + result.content.email_id;
        document.getElementById("mailid").innerHTML = mailid;
        const tzone = "Time Zone: " + result.content.time_zone;
        document.getElementById("tzone").innerHTML = tzone;
        const created_time = " Joined On: " + result.content.created_time;
        document.getElementById("ctime").innerHTML = created_time;
    }).catch(err => {
        //If the user is not logged in, this will be displayed to the user and they will be redirected to the login page
        document.body.style.visibility = "visible";
        document.body.innerHTML = 'You are not logged in. Please log in to continue. Redirecting you to the login page..';
        setTimeout(function () {
           window.location.href = "/__catalyst/auth/login";
        }, 5000);
    });
}

function logout() {
    //The signOut method is used to sign the user out of the application
    const redirectURL = location.protocol +"//"+ location.hostname + "/__catalyst/auth/login";
    catalyst.auth.signOut(redirectURL);
}

```

**client-package.json**

```json

    {
        "name" : "ZylkerTechnologies",
        "version" : "0.0.1",
        "homepage" : "/__catalyst/auth/login", 
        "login_redirect" : "index.html"
    }
```

> **Note:** The home page URL can be copied from the `Access URL` generated by Catalyst in the [Authentication Types](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/authentication-types/) section of the console.

The client directory is now configured. 

Let’s go over how the function and the client code works:

* The end-user will first encounter the **Login Page** you have configured and styled in the console.
* To create an account, they will click the **Sign Up** option and be directed to the *Sign Up* page.

> **Note:** End-users can either sign up to your application using their [Social Logins](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/social-logins/introduction/) or use the conventional method of signing up to the application using their email ID.

* Once the information is inputted and they click **Sign Up**, or if they attempt to sign up using a Social Login of their choice, their details will be provided as a JSON input to the [Custom User Validation](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/whitelisting/custom-user-validation/introduction/) function (`authorization_portal_function/index.js`).

* The function will only authenticate users if the condition you have coded is satisfied. For this tutorial, the users will only be authenticated if they signed up to the application using a Zylker registered email address.

* Upon successful authentication, an [Email Verification](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/email-templates/introduction/) email will be sent to the account they used to sign up to the application.

> **Note:** Because we are using [Hosted Login](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/native-catalyst-authentication/hosted-authentication-type/introduction/), a native Catalyst authentication type, no additional logic to trigger the appropriate emails is required. It will be handled by Catalyst automatically.

* Once the user verifies their email address by clicking the link provided in the email, they will be signed up to the application. Their details can be viewed in the [User Management](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/user-management/introduction/) section of the *Authentication* component.

* The end-user can now log in to the application using their authenticated credentials.

* The end-user can also reset their password by clicking the **Forgot Password** option. In this event, the *Password Reset* email will be sent to their registered email. Following the steps mentioned in the email, they can easily reset their credentials.

**React web app**

Let’s configure the client component.

The React web [client directory](https://docs.catalyst.zoho.com/en/cli/v1/project-directory-structure/client-directory) contains the following files:

- The root directory of the client contains a `client-package.json` file, which is a configuration file defining the name, version, default home page, and redirect page of the client component.
- The `zylkertechnologies` client directory contains two subfolders, as per the default project structure of a React app:
    - The `public` folder is generally used to hold files that can be openly accessed by browsers through public URLs, such as icon files of the web app, the `index.html` file, and the `404.html` file.
    - The `src` folder contains the application’s source files that will be included in the build folder when we compile the React app.
    - The client directory also contains the [`package.json`](https://docs.npmjs.com/files/package.json) dependency file and a  hidden [`.gitignore`](https://docs.npmjs.com/files/package.json) file.
- The files present in the `public` folder include:
    - [Native React files](https://reactjs.org/docs/getting-started.html?#try-react) such as setup `Tests.js`, `index.js`, `reportWebVitals.js`, `logo.svg`, and `App.test.js`.
    - `index.html` - Contains Catalyst web sdk that allows you to access Catalyst components.
    - We will be creating an additional `404.html` file that will contain the error handling elements.
- The files present in the `src` folder include:
    - Native React files such as `setupTests.js`, `reportWebVitals.js`, `logo.svg`, and `App.test.js`.
    - `App.js` - Contains the hash routes to your application
    - `App.css` - Contains the overall styling elements of your application
    - `index.js` - The entry point of the react application.
    - `index.css` - Contains the styling of the elements present in the `index.js` file.
    - You will be creating the following files in the `src` folder:
        - `Button.css` - Contains the styling elements for the *Logout* button that will be present in the application.
        - `Button.js` - Contains the React component for the *Logout* present in the application.
        - `Layout.js` - Contains the React component for the application's logic
        - `LoginPage.js` - Contains the React component for the login pages you generated in the Catalyst console.
        - `UserProfile.css` - Contains the styling elements for the user information page that will be displayed once you log in to the application.
        - `UserProfile.js` - Contains the React component to render the user details after you login.

We will be coding in the `index.html`, `404.html`, `App.js`, `App.css`, `index.css`, `index.js`, `Button.css`, `Button.js`, `Layout.js`, `LoginPage.js`, `UserProfile.css`, and `UserProfile.js` files. We will also be making a change in the `client-package.json`. to ensure that the homepage of the application is the authenticated page.

> **Note:** You can delete the native React files as they not required for building this application.

#### Install additional React packages

The `react-router-dom` package needs to be installed in the `AuthorizationPortal/zylkertechnologies` client directory using the CLI command given below:

```sh
npm install react-router-dom
```

This command will install the `react-router-dom` module, save the dependencies, and allow us to perform the required hash routing in our application.

This is the client directory after you have created the required files and deleted the unnecessary files.
![catalyst_hosted_login_react_directory_modified](https://catalyst-docs-development.zohostratus.in/images/tutorials/hosted-login/catalyst_hosted_login_react_directory_modified.webp)

> **Note:** Please go through the all code given in this section to ensure you fully understand it.

Copy the code given below and paste it in `index.html` and `404.html`, respectively, located in the client directory (`zylkertechnologies/public/`) using an IDE and save the file.

**index.html**

```xml
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <meta name="theme-color" content="#000000" />
    <meta
      name="description"
      content="Web site created using create-react-app"
    />
    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
    <title>React App</title>
    <script src="https://static.zohocdn.com/catalyst/sdk/js/4.6.2/catalystWebSDK.js"> </script>
    <script src="/__catalyst/sdk/init.js"></script>
  </head>
  <body>
    <noscript>You need to enable JavaScript to run this app.</noscript>
    <div id="root"></div>
  </body>
</html>

```

**404.html**

```xml
<!DOCTYPE html>
<html lang="en">
  <head>
    <h2>You are viewing this 404 page since you tried to access a page which does not exist.</h2>
  </head>
</html>

```

Copy the code given below and paste it in `App.css`, `App.js`, `index.js`, `index.css`, `Button.css`, `Button.js`, `Layout.js`, `LoginPage.js`, `UserProfile.css`, and `UserProfile.js`, respectively, located in client directory (`zylkertechnologies/src/`) using an IDE and save the file.

**App.css**

```css
.App {
  text-align: center;
}

.App-logo {
  height: 40vmin;
  pointer-events: none;
}

@media (prefers-reduced-motion: no-preference) {
  .App-logo {
    animation: App-logo-spin infinite 20s linear;
  }
}

.App-header {
  background-color: #282c34;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: calc(10px + 2vmin);
  color: white;
}

.App-link {
  color: #61dafb;
}

@keyframes App-logo-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.inputs {
  width: 90%;
  padding: 15px;
  margin: 15px 0 22px 0;
  display: inline-block;
  border: none;
  background: #f1f1f1;
  border-radius: 8px;
}
#root {
  background-color: #c0c0c0;
}
h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 1;
}

```

**App.js**

```javascript
import "./App.css";
import { HashRouter, Navigate, Route, Routes } from "react-router-dom";
import Layout from "./Layout";

function App() {
  return (
    <HashRouter>
      <Routes>
        <Route path="/" element={<Layout />} />
        <Route path="" element={<Navigate to="/" replace />} />
        <Route path="*" element={<Navigate to="/" replace />} />
      </Routes>
    </HashRouter>
  );
}

export default App;

```

**index.css**

```css
body {
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: #c0c0c0;
}

```

**index.js**

```javascript
import React from "react";
import "./index.css";
import App from "./App";
import * as ReactDOM from "react-dom/client";

const root = ReactDOM.createRoot(document.getElementById("root"));
root.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
);

```

**Button.css**

```css
button {
  border: none;
  outline: 0;
  display: inline-block;
  padding: 8px;
  color: white;
  background-color: #000;
  text-align: center;
  cursor: pointer;
  width: 20%;
  font-size: 18px;
  border-radius: 8px;
}

button:hover,
.forgetPassword-btn:hover,
a:hover {
  opacity: 0.7;
}
a {
  text-decoration: none;
  font-size: 22px;
  color: black;
}

```

**Button.js**

```javascript
import { useCallback } from "react";
import "./Button.css";

function Button({ title }) {
  const logout = useCallback(() => {
    const redirectURL = "/__catalyst/auth/login";
    window.catalyst.auth.signOut(redirectURL);
  }, []);
  return (
    <div id="logoutbtn" style={{ textAlign: "inline-block" }}>
      <button onClick={logout} id="logout" style={{ display: "inline-block" }}>
        {title}
      </button>
    </div>
  );
}

export default Button;

```

**Layout.js**

```javascript
import UserProfile from "./UserProfile";
import LoginPage from "./LoginPage.js";
import { useEffect, useState } from "react";

function Layout() {
  const [isUserAuthenticated, setIsUserAuthenticated] = useState(false);
  const [isFetching, setIsFetching] = useState(true);
  const [userDetails, setUserDetails] = useState({
    firstName: "",
    lastName: "",
    mailid: "",
    timeZone: "",
    createdTime: "",
  });

  useEffect(() => {
    window.catalyst.auth
      .isUserAuthenticated()
      .then((result) => {
        let userDetails = {
          firstName: result.content.first_name,
          lastName: result.content.last_name,
          mailid: result.content.email_id,
          timeZone: result.content.time_zone,
          createdTime: result.content.created_time,
        };
        setUserDetails(userDetails);
        setIsUserAuthenticated(true);
      })
      .catch((err) => {})
      .finally(() => {
        setIsFetching(false);
      });
  }, []);
  return (
    <>
      {isFetching ? (
        <p>Loading ....</p>
      ) : isUserAuthenticated ? (
        <UserProfile userDetails={userDetails} />
      ) : (
        <LoginPage />
      )}
    </>
  );
}

export default Layout;

```

**LoginPage.js**

```javascript
import { useEffect } from "react";

function Login() {
  useEffect(() => {
    window.location.href = window.origin + "/__catalyst/auth/login";
  }, []);
  return null;
}

export default Login;

```

**UserProfile.css**

```css
.card {
  margin: auto;
  text-align: center;
  font-family: arial;
  text-align: center;
  font-weight: bold;
}

.title {
  font-size: 23px;
  color: black;
}
#userimg {
  height: 20%;
  width: 15%;
}

div.login {
  padding-top: 10px;
  height: 260px;
  width: 500px;
  margin: 0 auto;
}

div.signup {
  display: none;
}

div.forgotpwd {
  display: none;
}

/* Full-width input fields */
input[type="text"] {
  width: 90%;
  padding: 15px;
  margin: 15px 0 22px 0;
  display: inline-block;
  border: none;
  background: #f1f1f1;
  border-radius: 8px;
}

/* Add a background color when the inputs get focus */
input[type="text"]:focus,
input[type="password"]:focus {
  background-color: #ddd;
  outline: none;
}

/* Set a style for all buttons */

/* Float cancel and signup buttons and add an equal width */
.seperatebtn {
  width: 10%;
  padding: 8px;
  border-radius: 8px;
}

.signupbtn {
  width: 10%;
  padding: 8px;
  border-radius: 8px;
}

.signupfnbtn {
  width: 20%;
  padding: 8px;
  border-radius: 8px;
}

.pwdfnbtn {
  width: 40%;
  padding: 8px;
  border-radius: 8px;
}

/* The Modal (background) */
.modal {
  display: none;
  /* Hidden by default */
  position: fixed;
  /* Stay in place */
  z-index: 1;
  /* Sit on top */
  left: 0;
  top: 0;
  width: 100%;
  /* Full width */
  height: 100%;
  /* Full height */
  overflow: auto;
  /* Enable scroll if needed */
  background-color: #474e5d;
}

/* Modal Content/Box */
.modal-content {
  background-color: #c0c0c0;
  margin: 5% auto 15% auto;
  /* 5% from the top, 15% from the bottom and centered */
  width: 25%;
  /* Could be more or less, depending on screen size */
}

/* The Close Button (x) */
.close {
  position: absolute;
  right: 35px;
  top: 15px;
  font-size: 40px;
  font-weight: bold;
  color: #f1f1f1;
}

.close:hover,
.close:focus {
  color: #f44336;
  cursor: pointer;
}

/* Clear floats */
.clearfix::after {
  content: "";
  clear: both;
  display: table;
}

p.homepage {
  font-size: 23px;
}

/* Change styles for cancel button and signup button on extra small screens */
@media screen and (max-width: 100px) {
  .signupbtn {
    width: 100%;
  }
}

```

**UserProfile.js**

```javascript
import Button from "./Button";
import "./UserProfile.css";
function UserProfile({ userDetails }) {
  return (
    <div className="card">
      <br> </br>
      <h1 className="title">User Profile Information</h1>
      <img
        alt="usericon"
        id="userimg"
        width="200px"
        height="450px"
        src="https://cdn2.iconfinder.com/data/icons/user-management/512/profile_settings-512.png"
      />
      <p className="title">First Name : {userDetails.firstName}</p>
      <p className="title">Last Name: {userDetails.lastName}</p>
      <p className="title">Email Address: {userDetails.mailid}</p>
      <p className="title">Time Zone: {userDetails.timeZone}</p>
      <p className="title">Joined On: {userDetails.createdTime}</p>
      <Button title="Logout"> </Button>
    </div>
  );
}
export default UserProfile;

```

**client-package.json**

```json

    {
        "name": "zylkertechnologies",
        "version": "0.0.1",
        "homepage": "/__catalyst/auth/login",
        "login_redirect": "index.html"
    }
```

> **Note:** The home page URL can be copied from the `Access URL` generated by Catalyst in the [Authentication Types](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/authentication-types/) section of the console.

The client directory is now configured.

Let’s go over the working of the function and the client code:

* The end-user will first encounter the *Login Page* that you configured and styled in the console.
* To create an account, they will click the **Sign Up** option and be directed to the *Sign Up* page.

> **Note:** End-users can either sign up to your application using their [Social Logins](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/social-logins/introduction/) or use the conventional method of signing up to the application using their email ID.

* Once the information is inputted and they click **Sign Up**, or if they attempt to sign up using a Social Login of their choice, their details will be provided as a JSON input to the [Custom User Validation](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/whitelisting/custom-user-validation/introduction/) function (`authorization_portal_function/index.js`).

* The function will only authenticate users if the condition you have coded is satisfied. For this tutorial, the users will only be authenticated if they signed up to the application using a Zylker registered email address.

* Upon successful authentication, an [Email Verification](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/email-templates/introduction/) email will be sent to the account they used to sign up to the application.

> **Note:** Because we are using [Hosted Login](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/native-catalyst-authentication/hosted-authentication-type/introduction/), a native Catalyst authentication type, no additional logic to trigger the appropriate emails is required. It will be handled by Catalyst automatically.

* Once the user verifies their email address by clicking the link provided in the email, they will be signed up to the application. Their details can be viewed in the [User Management](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/user-management/introduction/) section of the *Authentication* component.

* The end-user can now log in to the application using their authenticated credentials.

* The end-user can also reset their password by clicking the **Forgot Password** option. In this event, the *Password Reset* email will be sent to their registered email. Following the steps mentioned in the email, they can easily reset their credentials.

**Angular web app**

Let’s configure the client component.

The Angular web [client directory](https://docs.catalyst.zoho.com/en/cli/v1/project-directory-structure/client-directory/) contains: 

* The root directory of the client contains a `client-package.json` file, which is a configuration file defining the name, version, default home page, and redirect page of the client component. We will be modifying this file after we have coded the client component.
* [Native Angular files](https://angular.io/docs) such as `angular.json`, `tsconfig.app.json`, `tsconfig.json`, and `tsconfig.spec.json` files.
* The root directory of the client also contains the `package.json` dependency file, and a `.gitignorefile`.
* The `src` folder contains the following files and directories as per the default project structure of the Angular app:
  - Native Angular files such as `favicon.ico`, `main.ts`, `polyfills.ts`, and `test.ts` files along with the `assets`, and environment directories.
  - `index.html`: The default entry point of the application.
  - `style.css`: Will contain any styling elements required by the overall application.
* The files present in the `src/app/` directory are:
  - Native Angular files such as `app.component.css` and `app.component.spec.ts`.
  - `app.component.html`: Contains the HTML component that renders the routing that happens in the application.
  - `app.component.ts`: Contains the global interface of the application where a Catalyst variable is declared to use Catalyst Web SDK methods.
  - `app.module.ts`: Contains the routing logic involved in the application

We will be coding the `index.html`, `app.component.html`, `app.component.ts`, and the `app.module.ts` files.

#### Create a Layout Component

You need to create a layout component in the `src/app/` directory path. This component will contain the the styling elements, client logic and redirect logic to provide appropriate responses to authenticated and non-authenticated users.

Execute the following command in the `src/app/` directory using the Catalyst CLI:

```sh
ng generate component layout
```

![catalyst_authentication_client_layout_generate_angular](https://catalyst-docs-development.zohostratus.in/images/tutorials/hosted-login/catalyst_authentication_client_layout_generate_angular.webp)

This will create a folder named `layout` in the `src/app/` directory. 

This `layout` folder will contain:
* Native Angular file called `layout.component.pec.ts`.
* `layout.component.html`: Will contain the HTML component required during user validation.
* `layout.component.css`: Will contain the required styling elements.
* `layout.component.ts`: Will contain the routing and redirect logic.

We will be coding the `layout.component.html`, `layout.component.css`, and the `layout.component.ts` files.

#### Create a Login Component

You need to create a login component in the `src/app/` directory path. This component will contain the redirect logic to provide appropriate responses to authenticated and non-authenticated users.

Execute the following command in the `src/app/` directory using the Catalyst CLI:

```sh
ng generate component login
```

![catalyst_authentication_client_login_generate_angular](https://catalyst-docs-development.zohostratus.in/images/tutorials/hosted-login/catalyst_authentication_client_login_generate_angular.webp)

This will create a folder named `login` in the `src/app/` directory. 

This `login` folder will contain:
* Native Angular file called `login.component.pec.ts`.
* `login.component.html`: Will contain the HTML component required during user validation.
* `login.component.css`: Will contain the required styling elements.
* `login.component.ts`: Will contain the routing and redirect logic.

We will be coding the `login.component.css`, and the `login.component.ts` files.

The client directory should now look like the one depicted in the following image.
![catalyst_authentication_hosted_node_client_angular_type_last_directory](https://catalyst-docs-development.zohostratus.in/images/tutorials/hosted-login/catalyst_authentication_hosted_node_client_angular_type_last_directory.webp)

You can now begin coding your client.

> **Note:** Please go through the code given in this section to ensure you fully understand it.

Copy the below code and paste it in the `index.html` file present in the `src/` directory.

**index.html**

```xml

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <title>Zylker Technologies</title>
    <base href="/app/" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <script src="https://static.zohocdn.com/catalyst/sdk/js/4.6.2/catalystWebSDK.js"> </script>
    <script src="/__catalyst/sdk/init.js"> </script>
  </head>
  <body>
    <app-root> </app-root>
  </body>
</html>

```

Paste the following code in the `app.component.html`, `app.component.ts`, and the `app.module.ts` files present in the `src/app/` directory.

**app.component.html**

```xml

<router-outlet> </router-outlet>

```

**app.component.ts**

```javascript

import { Component } from '@angular/core';

declare global {
  interface Window {
    catalyst: any;     //This is a Catalyst variable that is required to access Catalyst Web SDK methods.
  }
}

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent {

}

```

> **Note:** The variable `any` is a Catalyst variable we have declared globally. This variable is required to access [Catalyst Web SDK methods](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/authentication/get-auth-instance/).

**app.module.ts**

```javascript

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { CommonModule } from '@angular/common';

import { AppComponent } from './app.component';
import { FormsModule } from '@angular/forms';
import { RouterModule, Routes } from '@angular/router';
import { LayoutComponent } from './layout/layout.component';
import { LoginComponent } from './login/login.component';

const approutes: Routes = [
  { path: '', component: LayoutComponent },
  { path: 'login', component: LoginComponent },
  { path: '**', redirectTo: '' },
];

@NgModule({
  declarations: [AppComponent, LayoutComponent, LoginComponent],
  imports: [
    BrowserModule,
    CommonModule,
    FormsModule,
    RouterModule.forRoot(approutes, { useHash: true }),
  ],
  providers: [],
  bootstrap: [AppComponent],
})
export class AppModule {}

```

Copy the following code and paste it in the `layout.component.html`, `layout.component.css`, and the `layout.component.ts` files present in the `src/app/layout` directory.

**layout.component.html**

```xml

<div class="card" *ngIf="isAuthenticated">
  <div class="titleDiv">
    <h1 class="title">User Profile Information</h1>
  </div>
  <div class="imgDiv">
    <img
      id="userimg"
      width="200px"
      height="450px"
      src="https://cdn2.iconfinder.com/data/icons/user-management/512/profile_settings-512.png"
    />
  </div>
  <div class="textDiv">
    <p class="title" id="fname">First Name: {{ firstName }}</p>
    <p class="title" id="lname">Last Name: {{ lastName }}</p>
    <p class="title" id="mailid">Email ID: {{ mailID }}</p>
    <p class="title" id="tzone">Time Zone: {{ timezone }}</p>
    <p class="title" id="ctime">CreatedTime: {{ createdTime }}</p>
  </div>
  <div className="logoutDiv">
    <button (click)="logout()" id="logoutBtn">Logout</button>
  </div>
</div>

<div *ngIf="isFetching" class="loading-div">
  <p class="loading">Loading...</p>
</div>

```

**layout.component.css**

```css

.card {
  margin: auto;
  text-align: center;
  font-family: arial;
  text-align: center;
  font-weight: bold;
}
.title {
  font-size: 23px;
  color: black;
  margin-top: 30px;
  margin-bottom: 30px;
  font-weight: bold;
}
#userimg {
  height: 20%;
  width: 15%;
}

#logoutBtn {
  background-color: rgb(2, 136, 2);
  color: white;
  border: none;
  border-radius: 8px;
  width: 100px;
  height: 40px;
  margin-bottom: 30px;
  cursor: pointer;
}

#logoutBtn:hover {
  background-color: rgb(2, 165, 2);
  color: white;
  border: none;
  border-radius: 8px;
  width: 100px;
  height: 40px;
  margin-bottom: 30px;
  cursor: pointer;
}

body {
  width: 100%;
}

.loading-div {
  margin-left: 45%;
}

.loading {
  font-weight: bolder;
  font-size: large;
}

#logoutBtn:active {
  background-color: rgb(2, 172, 2);
  color: white;
  border: none;
  border-radius: 8px;
  width: 100px;
  height: 40px;
  margin-bottom: 30px;
  cursor: pointer;
}

```

**layout.component.ts**

```javascript

import { Component, OnInit } from '@angular/core'; //decorator which indicates this is a component
import { Router } from '@angular/router';

@Component({
  selector: 'app-layout',
  templateUrl: './layout.component.html',
  styleUrls: ['./layout.component.css'],
})
export class LayoutComponent implements OnInit {
  constructor(private router: Router) {}

  firstName: any;
  lastName: any;
  mailID: any;
  timezone: any;
  createdTime: any;
  isAuthenticated: boolean = false;
  isFetching: boolean = true;

  ngOnInit(): void {
    window.catalyst.auth
      .isUserAuthenticated()
      .then((result: any) => {
        console.log(result);
        console.log(result.content.email_id);
        this.isAuthenticated = true;
        this.mailID = result.content.email_id;
        this.firstName = result.content.first_name;
        this.lastName = result.content.last_name;
        this.timezone = result.content.time_zone;
        this.createdTime = result.content.created_time;
      })

      .catch((err: any) => {
        console.log(err);
      })
      .finally(() => {
        console.log('finally');
        this.isFetching = false;

        this.isAuthenticated
          ? this.router.navigate([''])
          : this.router.navigate(['login']);
      });
  }

  logout() {
    const redirectURL = '/__catalyst/auth/login';
    console.log(redirectURL);

    var auth = window.catalyst.auth;
    auth.signOut(redirectURL);
  }
}

```

Copy the following code and paste it in the `login.component.css`, and the `login.component.ts` files present in the `src/app/login` directory. 

**layout.component.css**

```css

h1 {
 color: red;
}

```

**login.component.ts**

```javascript

import { Component, OnInit } from '@angular/core'; //decorator which indicates this is a component

@Component({
 selector: 'app-login',
 templateUrl: './login.component.html',
 styleUrls: ['./login.component.css'],
})
export class LoginComponent {
 ngOnInit(): void {
 window.location.href = window.origin + '/__catalyst/auth/login'; // Will handle the login redirects 
 }
}

```

We will now modify the `client-package.json` file present in the client root directory.

**client-package.json**

```json

    {
        "name": "zylkertechnologies",
        "version": "0.0.1",
        "homepage": "/__catalyst/auth/login",
        "login_redirect": "index.html"
    }
```

> **Note:** The `homepage URL` can be copied from the [`Access URL`](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/native-catalyst-authentication/hosted-authentication-type/configure-hosted-authentication/) generated by Catalyst in the [Authentication Types section](https://docs.catalyst.zoho.com/en/cloud-scale/help/authentication/authentication-types/) of the console.

The client directory is now configured.

Let's go over the working of the function and client code.

* The end-user will first encounter the Login Page that you configured and styled in the console.

* To create an account, they will click the Sign Up option and be directed to the Sign Up page.

> **Note:** End-users can either sign up to your application using the *Social Logins* or use the conventional method of signing up to the application using their email address

* After the information has been entered and they click **Sign Up**, or if they attempt to sign up using a *Social Login* of their preference, their details will be populated and provided as a JSON input to the Custom User Validation function- `authorization_portal_function/index.js`. 

* The function will only authenticate users that have signed up to the application using a Zylker email address.

* Upon successful authentication, an *Email Verification* email will be sent to the account they used to sign up to the application.

> **Note:** Because we are using **Hosted Login**, no additional logic to trigger the appropriate emails is required. It will be handled by Catalyst automatically.

* After the user verifies their email address by clicking the link provided in the email, they will be signed up for the application. Their details can be viewed in the *User Management* section of the Authentication component.

* The end-user can now log in to application using their authenticated credentials.

* The end-user can also reset their password by clicking the **Forgot Password** option.

* In this event, the *Password Reset* email will be sent to their registered email. Following the steps mentioned in the email, they can easily reset their credentials.