⏰ 过期时间：
使用刷新令牌获取新的访问令牌:
curl -X POST http://localhost:3000/mcp/auth/login \
-H "Content-Type: application/json" \
-d '{
"grant_type": "refresh_token",
"refresh_token": "your-refresh-token",
"client_id": "mysql-mcp-client",
"client_secret": "mysql-mcp-secret"
}'