feat(api_connection): add test request to VBB API and ignore env files

lib/main.dart

@@ -1,6 +1,9 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_dotenv/flutter_dotenv.dart';
+import 'api_handler.dart';
 
-void main() {
+void main() async {
+  await dotenv.load();
   runApp(const MyApp());
 }
 
@@ -55,6 +58,10 @@ class MyHomePage extends StatefulWidget {
 
 class _MyHomePageState extends State<MyHomePage> {
   int _counter = 0;
+  //String API_KEY = ApiHandler.accessID;
+  String API_KEY = "no telly";
+  //Future<Map<String, dynamic>> ?id;
+  String id = '';
 
   void _incrementCounter() {
     setState(() {
@@ -66,6 +73,10 @@ class _MyHomePageState extends State<MyHomePage> {
       _counter++;
     });
   }
+  void show_result(Future<String> future_id) async {
+    id = await future_id;
+    setState(() { });
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -109,6 +120,13 @@ class _MyHomePageState extends State<MyHomePage> {
               '$_counter',
               style: Theme.of(context).textTheme.headlineMedium,
             ),
+            Text('API key from ENV is $API_KEY'),
+            MaterialButton(onPressed: () { show_result(ApiHandler.findStations('S Biesdorf')); setState(() {}); },
+              child: Text(
+                  'Search for \'S Biesdorf\''
+              ),
+            ),
+            Text(id)
           ],
         ),
       ),