GitHub OAuth Login in Node.js – Step-by-Step GitHub Authentication Tutorial
This video demonstrates how to implement GitHub OAuth login in a Node.js + Express application from scratch. It covers the entire OAuth2 flow: registering your app with GitHub, generating a secure state token, creating the Express login and callback routes, and handling the GitHub API calls. Key implementation steps include:
.Registering a GitHub OAuth App – obtain the Client ID and Client Secret from your GitHub Developer Settings
.Installing and using the “arctic” OAuth library – to generate a random state token for CSRF protection and build the GitHub authorization URL
. Creating an Express Login Route – redirecting the user to GitHub’s authorization page using the Client ID and state
. Handling the Callback Route – exchanging the returned code for an access token, then using that token to fetch the user’s GitHub profile (ID, name, email)
. User Logic in the Callback – checking if a user already exists in your MySQL(via Drizzle), linking GitHub to an existing account, or creating a new user as needed. The video also walks through a MySQL schema for storing GitHub auth details.
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⌛TIMELINE⏳
0:00 – Introduction to GitHub Login
0:40 – Demo of GitHub Login Flow
2:25 – Mention Free/Premium Source Code
2:46 – Steps to Implement GitHub Login
4:00 – Getting Client ID and Secret from GitHub
7:42 – Generating State with ‘arctic’ Package
10:00 – Creating GitHub Login Route
13:15 – Creating GitHub OAuth Instance
15:10 – Redirecting URL to GitHub
17:45 – GitHub OAuth Page and Callback Handling
19:50 – Creating GitHub Callback Route
20:40 – Understanding Callback Controller
24:05 – Checking If User Exists
25:12 – Fetching GitHub ID, Name, Email with Token
30:20 – If User Already Exists (GitHub Linked)
34:30 – GitHub OAuth Schema Explained
36:15 – If User Registered but Not Linked to GitHub
38:00 – If User Not Registered (No GitHub Login)
41:10 – Final GitHub Login Check