Undo unneeded change

Author: pamelafox

scripts/auth_common.py

@@ -5,7 +5,7 @@
 from msgraph import GraphServiceClient
 
 
-async def get_application(graph_client: GraphServiceClient, client_id: Optional[str]) -> Optional[str]:
+async def get_application(graph_client: GraphServiceClient, client_id: str) -> Optional[str]:
     try:
         app = await graph_client.applications_with_app_id(client_id).get()
         if app is None: