fix: api/token/route.ts with automatic dispatch (no agent name) (#331)

Co-authored-by: Fahim Uddin <fahim-uddin@users.noreply.github.com>

Author: thomasyuill-livekit

app/api/token/route.ts

@@ -37,8 +37,9 @@ export async function POST(req: Request) {
 
     // Parse room config from request body.
     const body = await req.json();
-    // Recreate the RoomConfiguration object from JSON object.
-    const roomConfig = RoomConfiguration.fromJson(body?.room_config, { ignoreUnknownFields: true });
+    const roomConfig = body?.room_config
+      ? RoomConfiguration.fromJson(body.room_config, { ignoreUnknownFields: true })
+      : new RoomConfiguration();
 
     // Generate participant token
     const participantName = 'user';
@@ -73,7 +74,7 @@ export async function POST(req: Request) {
 function createParticipantToken(
   userInfo: AccessTokenOptions,
   roomName: string,
-  roomConfig: RoomConfiguration
+  roomConfig: RoomConfiguration | undefined
 ): Promise<string> {
   const at = new AccessToken(API_KEY, API_SECRET, {
     ...userInfo,