fix(auth-twitter): Safeguard against undefined ID in Twitter auth response

Author: hcikikci

src/auth-twitter/auth-twitter.service.ts

@@ -34,7 +34,7 @@ export class AuthTwitterService {
     });
 
     return {
-      id: data.id.toString(),
+      id: data.id?.toString(),
       email: data.email,
       firstName: data.name,
     };