Update psc_api_user_authentication.py

src/user_workspaces_server/controllers/userauthenticationmethods/psc_api_user_authentication.py

@@ -375,7 +375,7 @@ def add_external_user_to_allocation(self, user_id):
                         "user": {"username": f"{user_id}"},
                         "allocation": {
                             "components": {
-                                "grant": {"number": f"{self.grant_nubmer}"},
+                                "grant": {"number": f"{self.grant_number}"},
                                 "resource": {"name": f"{self.resource_name}"},
                             }
                         },