The tenant code can be considered to adjust the restriction rules at the front end, allowing the encoding of pure numbers or underscores. Many companies integrate their own AD in the internal system. It is understood that the use of the work number as the user name is not small, This code corresponds to the Linux user, so that it can form a permission inheritance.（租户编码可以考虑在前端把限制规则调整一下，允许纯数字或者下划线这种的编码，很多公司在内部的系统中集成了自己的AD，据了解使用工号作为用户名的比例也不小，，这个编码对应linux的用户，这样正好能形成一个权限的继承。） #154