fix polar

rowers/integrations/polar.py

@@ -253,8 +253,12 @@ class PolarIntegration(SyncIntegration):
 
         return 1
 
-    def register_user(self, token):
-        _ = self.open()
+    def register_user(self, token, *args, **kwargs):
+        try:
+            _ = self.open()
+        except NoTokenError:
+            pass
+
 
         authorizationstring = 'Bearer {token}'.format(token=token)
         headers = {