用户相关服务找到 20 个接口
检查用户名是否存在
checkUserUsername
POST
/UserService/checkUserUsername原始定义
rpc checkUserUsername (CheckUserUsernameRequest) returns (CheckUserUsernameResponse);checkUserUsername
/UserService/checkUserUsernamerpc checkUserUsername (CheckUserUsernameRequest) returns (CheckUserUsernameResponse);