UAPIGateway错误码定义
| 错误消息 | HTTP状态码 |
| API not found error | 400 |
| Parameter error in API request | 400 |
| API authentication error | 400 |
| Blocked for unpaied order | 400 |
| Too many requests | 400 |
| Request body is too large | 413 |
| URI is too Long | 414 |
| Quota is not enough | 429 |
| Request header is too large | 494 |
| SSL certificate error | 495 |
| Upstream service unavailable | 502 |
| Response body is too large | 502 |
| Response header is too large | 502 |