How to Get User Data in Supabase After Email Verification

Email Verification and User Data Management

Using Supabase for web application development means that managing user data effectively and securely after email verification is essential. This standard criterion aids in guaranteeing that user interactions are validated and that users' data can only be accessed after their email has been confirmed. This procedure complies with best practices for handling sensitive user data while also safeguarding the user's account.

Since Supabase's guidelines and API references do not clearly define explicit events related to email verification, many developers encounter difficulties when attempting to access user data after the verification process. In order to close this gap and enable safe data handling and storage in your database, this introduction will explain how to set up a listener for authentication state changes that activates once the user's email has been validated.

Explaining Supabase Authentication Handling

Based on the status of email verification, the scripts make use of Supabase's JavaScript client library to handle user authentication and data storage. The onAuthStateChange event is raised when a user signs in, and it keeps track of any changes to the authentication state, like sign-ins and sign-outs. For apps whose activities are only allowed once the user's email has been verified, this feature is essential. It watches for the sign-in event and examines the email_confirmed_at field in the user object of the session to see if the user's email has been validated. The user has confirmed their email address if the attribute is true and existent.

The script then utilizes the select command to retrieve user data from a specified table if email verification is confirmed. Records are filtered using the eq function to match the user ID. Following authentication and email verification, this stage is crucial for safely retrieving or changing the user's data. The Node.js script uses the Supabase Admin client for server-side operations. This client grants more privileges, such as the ability to directly insert data into the database with the insert command, which is essential for keeping an independent record of users who have verified their email addresses.

import { createClient } from '@supabase/supabase-js';
const supabase = createClient('https://your-project-url.supabase.co', 'your-anon-key');
// Listen for authentication changes
supabase.auth.onAuthStateChange(async (event, session) => {
  if (event === 'SIGNED_IN' && session?.user.email_confirmed_at) {
    // User email is verified, fetch or save user info
    const { data, error } = await supabase
      .from('users')
      .select('*')
      .eq('id', session.user.id);
    if (error) console.error('Error fetching user data:', error);
    else console.log('User data:', data);
  }
});

const { createClient } = require('@supabase/supabase-js');
const supabaseAdmin = createClient('https://your-project-url.supabase.co', 'your-service-role-key');
// Function to check email verification and store data
async function verifyUserAndStore(userId) {
  const { data: user, error } = await supabaseAdmin
    .from('users')
    .select('email_confirmed_at')
    .eq('id', userId)
    .single();
  if (user && user.email_confirmed_at) {
    const userData = { id: userId, confirmed: true };
    const { data, error: insertError } = await supabaseAdmin
      .from('confirmed_users')
      .insert([userData]);
    if (insertError) console.error('Error saving confirmed user:', insertError);
    else console.log('Confirmed user saved:', data);
  } else if (error) console.error('Error checking user:', error);
}

Utilizing Supabase Authentication Events to Improve User Management

Supabase offers a robust authentication system that is essential for contemporary online applications that need safe user administration. Supabase's authentication features go beyond simple email verification; they enable developers to set up reactive workflows and real-time monitoring. This feature is especially helpful in situations when processing user data instantly is required following account creation or modifications. For instance, modifying user rights in accordance with their engagement or subscription level or integrating webhooks to initiate other services.

This expanded feature highlights Supabase's versatility as a complete back-end service that can support intricate user interactions and data flows, rather than just a database tool. Utilizing these features keeps programs stable, scalable, and secure—especially when managing delicate tasks like post-email data integrity verification and user authentication.