¿Cómo hacer un login custom con Discord?

How to set up a custom login with Discord?

Integrating a custom login with Discord may seem intimidating at first, but it's actually quite an accessible process. Using Auth0, a powerful platform for authentication, and the Discord API, you can allow users to sign in and access your application using their Discord accounts.

How to create a custom connection with Auth0?

To perform this integration, you first need to create a new connection in Auth0:

1. Log in to the Auth0 control panel and go to "Authentication" and then "Social".
2. Scroll down and select "Create Custom" for a new connection.
3. Enter a unique name for the connection, for example, "Discord" since the name "Discord" is already taken.
4. Provide the following URLs that you will get from Discord:
   • Authorization URL
   • Token URL

Both URLs are crucial, and can be located in Discord's OAuth documentation.

How to get the Discord credentials?

You must access the Discord developer portal:

1. Visit discord.com/developers/applications and create a new application.
2. Register the name and accept the terms and conditions.
3. Navigate to the "OAuth" section. Here, you will be able to copy two important pieces of information:
   • Client ID
   • Client Secret

These credentials are critical for authentication on Discord.

What roles and permissions should be configured?

When working with authentication APIs, the concept of "scopes" is vital. In the case of Discord, you must configure the following permissions to obtain the user's information:

• Identify: Allows access to the user's name and identifier.
• Email: To access the user's email address.

Always check the necessary scopes in the OAuth documentation of the service you are going to integrate.

How is the Fetch script for the user profile implemented?

To fetch and handle user profile data from Discord, a specific script is required:

const request = require('request');
function FetchDiscordUser(accessToken, context, callback) { const API_URL = 'https://discord.com/api/v10'; const CDN_URL = 'https://cdn.discordapp.com';
 request.get({ url: `${API_URL}/users/@me`, headers: { 'Authorization': `Bearer ${accessToken}`, }, }, }, function(err, response, body) { if (err || response.statusCode !== 200) { return callback(new Error('Error getting Discord user')); }
 try { const jsonResponse = JSON.parse(body); const profile = { id: jsonResponse.id, name: `${jsonResponse.username}#${jsonResponse.discriminator}`, nickname: jsonResponse.username, picture: `${CDN_URL}/avatars/${jsonResponse.id}/${jsonResponse.avatar}.png` };
 callback(null, profile); } catch (e) { callback(new Error('Error parsing JSON')); } } });}}
module.exports = FetchDiscordUser;

This script uses the latest version of the Discord API to ensure that you handle user data correctly. Installation of packages such as request may be necessary.

What to do if the redirect URL fails?

It is critical to verify that the redirect URL is set up correctly. This URL is essential to complete the OAuth flow and must match:

• Auth0's tenant domain, for example: https://yourtenant.auth0.com/login/callback.

Be sure to save the changes in Discord and return to Auth0 to test the connection.

Why experiment with other OAuth services?

Once Discord is configured, I encourage you to explore other services that implement OAuth. By creating new custom connections to these services in Auth0, you will improve and expand your understanding of the authentication flow. Keep experimenting and learning about this crucial aspect of modern development!