@@ -0,0 +1,10 @@
+from localstack.constants import DEFAULT_PORT_STS_BACKEND
+from localstack.services.infra import start_moto_server
+from localstack import config
+
+
+def start_sts(port=None, asynchronous=False, update_listener=None):
+    port = port or config.PORT_STS
+
+    return start_moto_server('sts', port, name='STS', asynchronous=asynchronous,
+                             backend_port=DEFAULT_PORT_STS_BACKEND, update_listener=update_listener)
Getting the below error for this import Unable to register plugins: cannot import name 'DEFAULT_PORT_STS_BACKEND' from 'localstack.constants'