removed many unneeded async definitions. The main controller remains async

server/app/main.py

@@ -9,7 +9,6 @@ from app.routers.contact import router as contact_router
 from app.routers.events import router as event_router
 from app.routers.group import router as group_router
 from app.routers.musicians import router as musician_router
-from app.routers.users import router as user_router
 from app.scripts.version import get_version
 
 app = FastAPI(
@@ -21,7 +20,6 @@ app.include_router(musician_router)
 app.include_router(group_router)
 app.include_router(contact_router)
 app.include_router(event_router)
-app.include_router(user_router)
 
 controller = MainController()