Fix slash in airflow.py

Author: dyakovri

auth_backend/auth_plugins/airflow.py

@@ -43,7 +43,7 @@ async def _update_outer_user_password(cls, username: str, password: str):
         res = False
         async with aiohttp.ClientSession() as session:
             async with session.patch(
-                str(cls.settings.AIRFLOW_AUTH_BASE_URL).removesuffix('/') + '/auth/fab/v1/users' + username,
+                str(cls.settings.AIRFLOW_AUTH_BASE_URL).removesuffix('/') + '/auth/fab/v1/users/' + username,
                 auth=aiohttp.BasicAuth(
                     cls.settings.AIRFLOW_AUTH_ADMIN_USERNAME, cls.settings.AIRFLOW_AUTH_ADMIN_PASSWORD
                 ),