Signup function in signup.dart Chat App with Flutter and Firebase

signup_function_in_signup.dart

  singUp() async {

    if(formKey.currentState.validate()){
      setState(() {

        isLoading = true;
      });

      await authService.signUpWithEmailAndPassword(emailEditingController.text,
          passwordEditingController.text).then((result){
            if(result != null){

              Navigator.pushReplacement(context, MaterialPageRoute(
                  builder: (context) => ChatRoom()
              ));
            }
      });
    }
  }