diff --git a/ucloud/metadata/main.py b/ucloud/metadata/main.py
index e7cb33b..9281d7c 100644
--- a/ucloud/metadata/main.py
+++ b/ucloud/metadata/main.py
@@ -3,7 +3,7 @@ import os
 from flask import Flask, request
 from flask_restful import Resource, Api
 
-from ucloud.config import etcd_client, env_vars, vm_pool
+from ucloud.config import etcd_client, config, vm_pool
 
 app = Flask(__name__)
 api = Api(app)
@@ -43,9 +43,7 @@ class Root(Resource):
         if not data:
             return {'message': 'Metadata for such VM does not exists.'}, 404
         else:
-
-            # {env_vars.get('USER_PREFIX')}/{realm}/{name}/key
-            etcd_key = os.path.join(env_vars.get('USER_PREFIX'), data.value['owner_realm'],
+            etcd_key = os.path.join(config['etcd']['USER_PREFIX'], data.value['owner_realm'],
                                     data.value['owner'], 'key')
             etcd_entry = etcd_client.get_prefix(etcd_key, value_in_json=True)
             user_personal_ssh_keys = [key.value for key in etcd_entry]