There are multiple methods available for authentication with Firebase. Ensure that the appropriate sign-in method has been enabled in the Firebase Console authentication panel. Note: custom auth does not require enabling.

• Anonymous
• Email and Password authentication
• Email Link authentication
• Custom Authentication and an Example Custom Token Generator
  
  
• Phone number sign-in with visible ReCaptcha
• Phone number sign-in with invisible ReCaptcha
• Phone number sign-in with simplified popup flow (not recommended for production apps)
  
  
• Google sign-in using Popup
• Google sign-in using Redirect
• Google sign-in using OAuth Credentials (via Google Sign-in Button)
  
  
• Facebook login using Popup
• Facebook login using Redirect
• Facebook login using OAuth Credentials (via Facebook Login Button)
  
  
• Twitter sign-in using Popup
• Twitter sign-in using Redirect
  
  
• GitHub sign-in using Popup
• GitHub sign-in using Redirect