Update tokenvault sample .env

Author: Sambego

auth-for-mcp/xmcp-mcp-tokenvault-js/.env.example

@@ -1,9 +1,16 @@
-AUTH0_DOMAIN=
-AUTH0_AUDIENCE=
-AUTH0_CLIENT_ID=
+# Auth0 Configuration for @xmcp-dev/auth0 plugin
+# See: https://xmcp.dev/docs/integrations/auth0
 
-# One of the ways to authorize your client
-AUTH0_CLIENT_SECRET= 
+# Auth0 tenant domain (format: <tenant>.<region>.auth0.com)
+DOMAIN=
 
+# API identifier URL (must match the API resource created in Auth0)
+AUDIENCE=
+
+# MCP server base URL
+BASE_URL=http://localhost:3001
 PORT=3001
-MCP_SERVER_URL=http://localhost:3001
+
+# Machine-to-machine application credentials
+CLIENT_ID=
+CLIENT_SECRET=