signUpByAccount method Null safety

Future<void> signUpByAccount()

Implementation

Future<void> signUpByAccount() async {
  Map _fields = {'userName': get('userName'), 'password': get('password')};
  NCMBRequest r = new NCMBRequest();
  Map response = await r.post(super.name, _fields);
  _fields.remove('password');
  await setLoginResponse(response);
}