Testing is complete!! And a nice build runner script to boot

backend/routes/join_room.dart

@@ -0,0 +1,50 @@
+import 'dart:io';
+
+import 'package:backend/authenticator.dart';
+import 'package:dart_frog/dart_frog.dart';
+import 'package:logging/logging.dart';
+import 'package:shared_models/user.dart';
+
+final log = Logger('join_room/');
+
+Future<Response> onRequest(RequestContext context) async {
+  // Only allow POST requests
+  if (context.request.method != HttpMethod.post) {
+    return Response(statusCode: HttpStatus.methodNotAllowed);
+  }
+
+  try {
+    // Parse the request body
+    final body = await context.request.json() as Map<String, dynamic>;
+    final createUserReq = CreateUserRequest.fromJson(body);
+
+    // Generate token
+    final authenticator = context.read<Authenticator>();
+    final (token, user) = await authenticator.generateToken(createUserReq);
+
+    if (token == null || user == null) {
+      final body = CreateUserResponse(
+        success: false,
+        token: null,
+        error: user == null ? 'Room ${createUserReq.roomCode} requested is not available' : 'Unexpected error occurred',
+        uuid: null,
+      ).toJson();
+      return Response.json(
+        statusCode: user == null ? HttpStatus.badRequest : HttpStatus.internalServerError,
+        body: body,
+      );
+    }
+
+    // Return the token
+    return Response.json(
+      body: CreateUserResponse(token: token, success: true, uuid: user.uuid).toJson(),
+    );
+  } catch (e) {
+    log.severe('Error:', e, StackTrace.current);
+    final body = CreateUserResponse(success: false, token: null, error: 'Internal server error', uuid: null).toJson();
+    return Response.json(
+      statusCode: HttpStatus.internalServerError,
+      body: body,
+    );
+  }
+}