Sign In With Popup

Use the signInWithPopup method to link a new OAuth credential (e.g., Google, Facebook) to the existing user account using a popup window.

You can sign in users of your application using different authentication providers like Google, Facebook, GitHub etc.

Ensure that your OAuth provider option has been enabled in your Firebase project.

Method

final userCredential = await FirebaseApp.firebaseAuth?.signInWithPopup(providerId);

Parameters

• providerId (String): The OAuth provider ID (e.g., 'google.com', 'facebook.com') to link to the user's account.

Return

• UserCredential?: Returns a UserCredential object containing the user's sign-in information.

This method opens a popup window to authenticate with the specified OAuth provider and links the new credential to the existing user account.

You will still need to implement the OAuth flow, which typically involves opening a popup window or redirecting the user to the provider's login page.