修改sn号重复注册问题

device-api-service/src/main/java/com/xy/service/MqttUserServiceImpl.java

@@ -36,7 +36,7 @@ import static com.xy.utils.PlusBeans.toPageBean;
 */
 @Service
 @AllArgsConstructor
-@Api(tags = "")
+@Api(tags = "mqtt认证")
 public class MqttUserServiceImpl extends ServiceImpl<MqttUserMapper, MqttUser> implements MqttUserService {
 
     @PostMapping("obj")