Add: get token from api

lib/providers/main.dart

@@ -6,6 +6,8 @@ class GymLinkProvider with ChangeNotifier {
   bool get isLoading => _isLoading;
   bool _blackTheme = false;
   bool get blackTheme => _blackTheme;
+  String _token = '';
+  String get token => _token;
   ThemeData _theme = myTheme;
   ThemeData get theme => _theme;
   void Function() _onError = () => {};
@@ -13,13 +15,16 @@ class GymLinkProvider with ChangeNotifier {
   void Function() get onError => _onError;
 
   void onTokenReceived(String token) {
-    if (token == 'token123') {
-      _isLoading = false;
-      notifyListeners();
-    } else {
-      _isLoading = true;
-      notifyListeners();
-    }
+    _token = token;
+    _isLoading = false;
+    notifyListeners();
+    // if (token == 'token123') {
+    //   _isLoading = false;
+    //   notifyListeners();
+    // } else {
+    //   _isLoading = true;
+    //   notifyListeners();
+    // }
   }
 
   void changeTheme(int color) {