change auth to more general req_meta

cylc/uiserver/resolvers.py

@@ -225,14 +225,16 @@ async def service(self, info, *m_args):
 
     async def nodes_mutator(self, info, *m_args):
         """Mutate node items of associated workflows."""
+        req_meta = {}
         _, _, w_args, _ = m_args
         w_ids = [
             flow[WORKFLOW].id
             for flow in await self.get_workflows_data(w_args)]
         if not w_ids:
             return [{
                 'response': (False, 'No matching workflows')}]
-        auth_user = info.context.get('current_user', 'unknown user')
+        req_meta['auth_user'] = info.context.get(
+            'current_user', 'unknown user')
 
         # Pass the multi-node request to the workflow GraphQL endpoints
         _, variables, _, _ = info.context.get('graphql_params')
@@ -248,5 +250,5 @@ async def nodes_mutator(self, info, *m_args):
         }
         multi_args = {w_id: graphql_args for w_id in w_ids}
         return await self.workflows_mgr.multi_request(
-            'graphql', w_ids, multi_args=multi_args, auth_user=auth_user
+            'graphql', w_ids, multi_args=multi_args, req_meta=req_meta
         )