You can sign in to your Rocket.Chat workspace by enabling GitHub or GitHub Enterprise OAuth.
Prerequisites
A GitHub or GitHub Enterprise account.
A GitHub OAuth app and the client ID and secret.
If you don't have an app, go to your GitHub Developers Settings, navigate to OAuth Apps, and click New OAuth App.
Fill in the required information, including the Authorization callback URL, and save your app.
Your Client ID and a button to Generate a new client secret are now displayed. Click the button to generate a new client secret for your OAuth credentials. Copy both the client ID and the secret.
Retrieve the Authorization Callback URL from the GitHub tab in your Rocket.Chat workspace. You can find it in the GitHub Callback URL section.
If your callback URL is wrong, GitHub does not display any error. Instead of logging in, you receive an error message saying, No matching login attempt found.
Enable GitHub OAuth
Navigate to OAuth settings (Administration > Workspace > Settings > OAuth) in your workspace.
In the GitHub tab, enable OAuth and fill in the Client Id and Client Secret you copied earlier.
For GitHub Enterprise, add your Server URL also.
Click Save changes.
A Sign in with GitHub button appears on your workspace's login page. Users can now Sign in with GitHub by clicking that button!