How do I print a value from an instance of 'User' in a flutter? - flutter

Question

class User {
String token;
User({this.token});
}
class AuthService {
final String url = 'https://reqres.in/api/login';
final controller = StreamController<User>();
Future<User> signIn(String email, String password) async {
final response =
await post(url, body: {'email': email, 'password': password});
final data = jsonDecode(response.body);
final user = _userFromDatabaseUser(data);
// print(user.token);
controller.add(user);
return user;
}
//create user obj based on the database user
User _userFromDatabaseUser(Map user) {
return user != null ? User(token: user['token']) : null;
}
//user stream for provider
Stream<User> get user {
return controller.stream;
}
}
//in Sign in page
onPressed: () async {
if (_formKey.currentState.validate()) {
dynamic result = await _auth.signIn(email, password);
print(result); // Instance of 'User'
}
}
I am new to flutter and want to make an app that only authenticated users. I'm trying to read user token data from a stream. then check that token is not null if I got token then goto home page otherwise it will show error how do I print or store token value?

Answer 1

You can do is when you get the user after the sign In:
User result = await _auth.signIn(email, password);
Then to see the data you can do is
print(result.token);
which will give you the token, and then you can use the shared prefrences to store your token and access it.
Check out the docs for the it: https://pub.dev/packages/shared_preferences

Answer 2

You can override Object.toString method.
you can add this method in your User class to print the token instead of Instance of 'User'.
#override
String toString() {
// TODO: change the below return to your desired string
return "token: $token";
}

Answer 3

You can print using
print(userModel.toString());