email_password_sign_in_model.dart

//　Form submit関数だけ抜粋
Future<bool> submit() async {
    try {
      updateWith(submitted: true);
      if (!canSubmit) {
        return false;
      }
      updateWith(isLoading: true);
      switch (formType) {
        case EmailPasswordSignInFormType.signIn:
          await firebaseAuth.signInWithCredential(
            EmailAuthProvider.credential(email: email, password: password)
          );
          break;
        case EmailPasswordSignInFormType.register:
          UserCredential userCredential = await firebaseAuth.createUserWithEmailAndPassword(
            email: email, password: password
          );
          await FirestoreService.createUser(userCredential);
          break;
        case EmailPasswordSignInFormType.forgotPassword:
          await firebaseAuth.sendPasswordResetEmail(email: email);
          updateWith(isLoading: false);
          break;
      }
      return true;
    } catch (e) {
      updateWith(isLoading: false);
      rethrow;
    }
  }