In this tutorial, we will be using Email & Password authentication system with HTML & Javascript Frontend. We will create a simple login form that will allow users to sign in to their account and redirect them to the dashboard page.

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Step 1 : Create the Login Page & Dashboard Page using HTML

Create two HTML files, login.html and dashboard.html. The login.html file will contain the login form, and the dashboard.html file will contain the dashboard page which will be redirect on successful login.

login.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Login</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #f0f0f0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }
        .container {
            background-color: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            max-width: 400px;
            width: 100%;
        }
        .container h2 {
            margin-bottom: 1rem;
            color: #333;
            text-align: center;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: #555;
        }
        .form-group input {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
        }
        .form-group input:focus {
            border-color: #007bff;
            outline: none;
        }
        .btn {
            width: 100%;
            padding: 0.75rem;
            border: none;
            border-radius: 5px;
            background-color: #007bff;
            color: white;
            font-size: 1rem;
            cursor: pointer;
        }
        .btn:hover {
            background-color: #0056b3;
        }
        .error {
            color: red;
            text-align: center;
            margin-bottom: 1rem;
        }
    </style>
    <script>
        async function login(event) {
            event.preventDefault();
            document.getElementById('error-message').textContent = '';

            const email = document.getElementById('email').value;
            const password = document.getElementById('password').value;

            try {
                const response = await fetch('{auth_base_url}/{auth_endpoint_path}', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                        'APP-KEY' : '{your_app_key}'
                    },
                    body: JSON.stringify({ email, password })
                });

                if (response.ok) {
                    const data = await response.json();
                    sessionStorage.setItem('user_id', data.BODY.user_id);
                    sessionStorage.setItem('token', data.BODY.access_token);
                    window.location.href = 'dashboard.html';
                } else {
                    console.error('Error:', response);
                    document.getElementById('error-message').textContent = 'Login failed. Please check your credentials.';
                }
            } catch (error) {
                console.error('Error:', error);
                document.getElementById('error-message').textContent = 'An error occurred. Please try again later.';
            }
        }
    </script>
</head>
<body>
    <div class="container">
        <h2>Login</h2>
        <div id="error-message" class="error"></div>
        <form onsubmit="login(event)">
            <div class="form-group">
                <label for="email">Email</label>
                <input type="email" id="email" required>
            </div>
            <div class="form-group">
                <label for="password">Password</label>
                <input type="password" id="password" required>
            </div>
            <button type="submit" class="btn">Login</button>
        </form>
    </div>
</body>
</html>
dashboard.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Dashboard</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #f0f0f0;
            margin: 0;
            padding: 0;
        }
        .navbar {
            background-color: #007bff;
            padding: 1rem;
            color: white;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .navbar h2 {
            margin: 0;
        }
        .btn-logout {
            padding: 0.5rem 1rem;
            border: none;
            border-radius: 5px;
            background-color: #ff4d4d;
            color: white;
            cursor: pointer;
        }
        .btn-logout:hover {
            background-color: #cc0000;
        }
        .content {
            padding: 2rem;
            text-align: center;
        }
        .welcome-message {
            font-size: 1.5rem;
            color: #333;
            margin-bottom: 2rem;
        }
    </style>
    <script>
        document.addEventListener('DOMContentLoaded', () => {
            const user = JSON.parse(sessionStorage.getItem('user_id'));
            const token = sessionStorage.getItem('token');

            if (!user || !token) {
                window.location.href = 'login.html';
            } else {
                document.getElementById('welcome-message').textContent = `Welcome, ${user.name}!`;
            }
        });

        function logout() {
            sessionStorage.removeItem('user');
            sessionStorage.removeItem('token');
            window.location.href = 'login.html';
        }
    </script>
</head>
<body>
    <div class="navbar">
        <h2>Dashboard</h2>
        <button class="btn-logout" onclick="logout()">Logout</button>
    </div>
    <div class="content">
        <div id="welcome-message" class="welcome-message"></div>
        <p>Login Successfull and user_id, access_token saved in the sessionStorage.</p>
        
        <p>Click on the logout button to clear the sessionStorage and redirect to the login page.</p> 
        
        <p>Here is your dashboard content. You can customize it to display user-specific information and actions.</p>

    </div>
</body>
</html>

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Step 2 : Setup Authentication in Zeromagic

  1. Create and open a new Project in the console. Add a Database to the project. You can use the database spinned up by Zeromagic or connect your own database. Here we are using the cosmosdb database provided by Zeromagic. To add a database, click on the Create Database on the Database section button and add your database.

    Refer here to know more about: Creating Database on the platform

  2. Create a new environment and map the added database to the environment. Here we are using the development environment and employees database

    Refer here to know more about: Creating Environments on the platform

  3. Add the Email & Password authentication connection under Methods. Click Add Connection to create a new connection.

    Refer here to know more about: Adding Authentication on the platform

  4. Now, go to Environments sections and select the environment you created. Copy the Auth Endpoint URL from the environment details. This is your authentication endpoint URL where you will be sending the APi requests. Your Auth endpoint URL looks similar to this:

    Auth Endpoint
    http://authn.zeromagic.cloud/auth/86165f63f34e4be89809c2948c424a99/development/

  5. Before making the APi request, let’s create a new user credentials in the database for this example. You can skip this step if your preferring to go with registering the user and login with that user credentials. We do provide endpoints to create a new user also.

    Refer here to know more about: Creating User on the platform

​
Step 3 : Making the API Request

  1. Replace the {auth_base_url}/{auth_endpoint_path} in the login.html file with the copied URL from the environment details and with the path to the email password login endpoint. Here the {auth_base_url} is http://authn.zeromagic.cloud/auth/86165f63f34e4be89809c2948c424a99/development/ and {auth_endpoint_path} is /email-password-login.

    Note: Replace the auth_base_url ith your actual URL. Refer to the Authentication API Reference for more details on the API endpoints.

  2. Replace the {your_app_key} with your actual APP-KEY in the headers of login.html file. You can find the APP-ID and APP-KEY in the Manage -> Settings section of your console.

    login.html
    async function login(event) {
    event.preventDefault();
    document.getElementById('error-message').textContent = '';
    const email = document.getElementById('email').value;
    const password = document.getElementById('password').value;

    try {
        //REPLACE HERE : `{auth_base_url}/{auth_endpoint_path}` with your auth base URL and api endpoint
        const response = await fetch('http://authn.zeromagic.cloud/auth/86165f63f34e4be89809c2948c424a99/development/email-password-login', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                //REPLACE HERE : `{your_app_key}` with your APP-KEY
                'APP-KEY': 'lwc66BSZmPilT7UnNhlut2QFfRYr82ErXMqCYsKhtFM'
            },
            body: JSON.stringify({ email, password })
        });

        if (response.ok) {
            const data = await response.json();
            sessionStorage.setItem('user_id', data.BODY.user_id);
            sessionStorage.setItem('token', data.BODY.access_token);
            window.location.href = 'dashboard.html';
        } else {
            console.error('Error:', response);
            document.getElementById('error-message').textContent = 'Login failed. Please check your credentials.';
        }
    } catch (error) {
        console.error('Error:', error);
        document.getElementById('error-message').textContent = 'An error occurred. Please try again later.';
    }
}

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Step 4 : Run the Application and Login

  1. Open the login.html file in your browser or with your preferred webserver. Enter the email and password of the user you created in the database and click on the Login button. Here login credentials users are
    Sample Credentails
    email=genie@zeromagic.cloud
password=genie#magic
  2. If the login is successful, you will be redirected to the dashboard.html page. If the login fails, you will see an alert message.

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Summary

In this tutorial, you learned how to create a simple login form using HTML and JavaScript and authenticate users using the Zeromagic authentication API. This is a basic example to get you started with authentication in Zeromagic.

We provide more basic authentication methods and advanced method like social login. Feel free to explore the Authentication API Reference and reach out to us if you have any questions.

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