Add: get token from api

lib/mobile_example.dart

@@ -1,8 +1,10 @@
+import 'dart:convert';
 import 'dart:math';
 
 import 'package:flutter/material.dart';
 import 'package:gymlink_module_web/main_mobile.dart';
 import 'package:gymlink_module_web/providers/main.dart';
+import 'package:http/http.dart' as http;
 import 'package:provider/provider.dart';
 
 void main() {
@@ -71,11 +73,50 @@ class _ExamplePageState extends State<ExamplePage> {
   @override
   void initState() {
     super.initState();
-    Future.microtask(
-        () => context.read<GymLinkProvider>().onTokenReceived('token123'));
+    // Future.microtask(
+    //     () => context.read<GymLinkProvider>().onTokenReceived('token123'));
     Future.microtask(() => context
         .read<GymLinkProvider>()
         .setTheme(ThemeData.light(useMaterial3: true)));
+
+    Future.microtask(() => context.read<GymLinkProvider>().setOnError(() {
+          const snackBar = SnackBar(
+            content: Text('Ошибка подключения'),
+            duration: Duration(seconds: 3), // Длительность отображения Snackbar
+            behavior: SnackBarBehavior
+                .fixed, // Поведение Snackbar (fixed или floating)
+          );
+          ScaffoldMessenger.of(context).showSnackBar(snackBar);
+          Future.delayed(const Duration(seconds: 3))
+              .then((value) => _setToken());
+        }));
+
+    Future.microtask(() async {
+      await _setToken();
+    });
+  }
+
+  Future<void> _setToken() async {
+    final token = await _getToken();
+    if (token != '') {
+      context.read<GymLinkProvider>().onTokenReceived(token);
+    } else {
+      context.read<GymLinkProvider>().onError();
+    }
+  }
+
+  Future<String> _getToken() async {
+    var url =
+        Uri.http('gymlink.freemyip.com:8080', 'api/auth/authorize_client');
+    var response = await http.post(url, body: {
+      'GymKey': 'eeb42dcb-8e5b-4f21-825a-3fc7ada43445',
+      'id': '123'
+    }); // Just testing token
+    var decodedBody = jsonDecode(response.body) as Map;
+    if (decodedBody['payload'] == null) {
+      return '';
+    }
+    return decodedBody['payload']['token'];
   }
 
   @override