Fix bug

Signed-off-by: Jael Gu <mengjia.gu@zilliz.com>

milvus_client.py

@@ -38,6 +38,10 @@ class MilvusClient(PyOperator):
         else:
             self._connection_args['secure'] = False
 
+        self._connection_args['user'] = user
+        self._connection_args['password'] = password
+        self._connection_args['token'] = token
+
         connections.connect(**self._connection_args)
 
     def __call__(self, collection_name: str, *data):