finished groups endpoint

src/app.module.ts

@@ -6,6 +6,7 @@ import { AuthenticationController } from './auth/controllers/authentication.cont
 import { UserModule } from './users/user.module';
 import { HomeModule } from './home/home.module';
 import { RoomModule } from './room/room.module';
+import { GroupModule } from './group/group.module';
 @Module({
   imports: [
     ConfigModule.forRoot({
@@ -15,6 +16,7 @@ import { RoomModule } from './room/room.module';
     UserModule,
     HomeModule,
     RoomModule,
+    GroupModule,
   ],
   controllers: [AuthenticationController],
 })