use users instead of user

VLESS-TCP/config_client.json

@@ -27,7 +27,7 @@
                     {
                         "address": "1.2.3.4",
                         "port": 1234,
-                        "user": [
+                        "users": [
                             {
                                 "id": "",
                                 "encryption": "none",
@@ -59,4 +59,4 @@
             }
         ]
     }
-}
+}