fixed running_servers count

jupyterhub/user.py

@@ -21,6 +21,7 @@ from .crypto import decrypt
 from .crypto import encrypt
 from .crypto import EncryptionUnavailable
 from .crypto import InvalidToken
+from .metrics import RUNNING_SERVERS
 from .metrics import TOTAL_USERS
 from .objects import Server
 from .spawner import LocalProcessSpawner
@@ -753,6 +754,7 @@ class User:
                     self.db.delete(oauth_client)
             self.db.commit()
             self.log.debug("Finished stopping %s", spawner._log_name)
+            RUNNING_SERVERS.dec()
         finally:
             spawner.orm_spawner.started = None
             self.db.commit()