Fixed exception when no token is fecthed in SSE

Author: chillaq

splitio/push/manager.py

@@ -143,7 +143,8 @@ def _trigger_connection_flow(self):
             self._feedback_loop.put(Status.PUSH_RETRYABLE_ERROR)
             return
 
-        if not token.push_enabled:
+
+        if token is None or not token.push_enabled:
             self._feedback_loop.put(Status.PUSH_NONRETRYABLE_ERROR)
             return
         self._telemetry_runtime_producer.record_token_refreshes()