diff --git a/grandlyon_cartads_cs/models.py b/grandlyon_cartads_cs/models.py
index 49bae33..3d53737 100644
--- a/grandlyon_cartads_cs/models.py
+++ b/grandlyon_cartads_cs/models.py
@@ -94,11 +94,11 @@ class GLCartaDSCS(AbstractCartaDSCS):
         # to DoS the server.
         # -- https://bz.apache.org/bugzilla/show_bug.cgi?id=39243
         # and that's why there's a seemingly unnecessary GET request first.
-        api_manager_token = self.resource.get_api_manager_token()
+        api_manager_token = self.get_api_manager_token()
         response = self.requests.get(self.sendfile_ws_url,
                 headers={'Authorization': api_manager_token})
         if response.status_code == 401:
-            api_manager_token = self.resource.get_api_manager_token(renew=True)
+            api_manager_token = self.get_api_manager_token(renew=True)
         b64_zip = base64.b64encode(open(zip_filename, 'rb').read())
         chunk_size = 16777216  # 16MB
         for n in range(0, len(b64_zip), chunk_size):