Bugfix: Jupyterhub master (beyond 0.9.4) makes get_current_user coroutine

Author: rkdarst

batchspawner/api.py

@@ -6,7 +6,12 @@ class BatchSpawnerAPIHandler(APIHandler):
     @web.authenticated
     def post(self):
         """POST set user spawner data"""
-        user = self.get_current_user()
+        if hasattr(self, 'current_user'):
+            # Jupyterhub compatability, (september 2018, d79a99323ef1d)
+            user = self.current_user
+        else:
+            # Previous jupyterhub, 0.9.4 and before.
+            user = self.get_current_user()
         data = self.get_json_body()
         for key, value in data.items():
             if hasattr(user.spawner, key):