How to Handle Firebase Auth exceptions on flutter

Question

Please does anyone know how to catch firebase Auth exceptions on flutter and display them?

Note: I am not interested in the console (catcherror((e) print(e))

Answer 1

NEW ANSWER (18/09/2020)

If you are using firebase_auth: ^0.18.0, error codes have changed!

For instance: ERROR_USER_NOT_FOUND is now user-not-found

I could not find any documentation about that, so I went into the source code and read comments for every error codes. (firebase_auth.dart)

I don't use all error codes in my app (e.g verification, password reset...) but you will find the most common ones in this code snippet:

(It handles old and new error codes)

String getMessageFromErrorCode() {
    switch (this.errorCode) {
      case "ERROR_EMAIL_ALREADY_IN_USE":
      case "account-exists-with-different-credential":
      case "email-already-in-use":
        return "Email already used. Go to login page.";
        break;
      case "ERROR_WRONG_PASSWORD":
      case "wrong-password":
        return "Wrong email/password combination.";
        break;
      case "ERROR_USER_NOT_FOUND":
      case "user-not-found":
        return "No user found with this email.";
        break;
      case "ERROR_USER_DISABLED":
      case "user-disabled":
        return "User disabled.";
        break;
      case "ERROR_TOO_MANY_REQUESTS":
      case "operation-not-allowed":
        return "Too many requests to log into this account.";
        break;
      case "ERROR_OPERATION_NOT_ALLOWED":
      case "operation-not-allowed":
        return "Server error, please try again later.";
        break;
      case "ERROR_INVALID_EMAIL":
      case "invalid-email":
        return "Email address is invalid.";
        break;
      case "ERROR_USER_NOT_FOUND":
      case "user-not-found":
        return "No account found with this email";
        break;
      default:
        return "Login failed. Please try again.";
        break;
    }
  }