diff --git a/batchspawner/api.py b/batchspawner/api.py
index bbaacbcd..514dd0a5 100644
--- a/batchspawner/api.py
+++ b/batchspawner/api.py
@@ -12,10 +12,16 @@ def post(self):
         else:
             # Previous jupyterhub, 0.9.4 and before.
             user = self.get_current_user()
+        token = self.get_auth_token()
+        spawner = None
+        for s in user.spawners.values():
+            if s.api_token == token:
+                spawner = s
+                break
         data = self.get_json_body()
         for key, value in data.items():
-            if hasattr(user.spawner, key):
-                setattr(user.spawner, key, value)
+            if hasattr(spawner, key):
+                setattr(spawner, key, value)
         self.finish(json.dumps({"message": "BatchSpawner data configured"}))
         self.set_status(201)
 
diff --git a/batchspawner/singleuser.py b/batchspawner/singleuser.py
index afb171a2..e3ffab22 100644
--- a/batchspawner/singleuser.py
+++ b/batchspawner/singleuser.py
@@ -22,4 +22,4 @@ def main(argv=None):
     run_path(cmd_path, run_name="__main__")
 
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    main()