Frontend WIP - just websocket support left

backend/routes/join_room.dart

@@ -15,8 +15,8 @@ Future<Response> onRequest(RequestContext context) async {
 
   try {
     // Parse the request body
-    final body = await context.request.json() as Map<String, dynamic>;
-    final createUserReq = CreateUserRequest.fromJson(body);
+    final body = await context.request.json();
+    final createUserReq = CreateUserRequest.fromJson(body as Map<String, dynamic>);
 
     // Generate token
     final authenticator = context.read<Authenticator>();