mysql8 navicat远程链接失败

 原因：mysql 8加密规则问题

更改加密规则：
 ALTER USER 'ycc'@'%' IDENTIFIED BY 'you password' PASSWORD EXPIRE NEVER;

修改一下密码：
ALTER USER 'ycc'@'%' IDENTIFIED WITH mysql_native_password BY 'you password';

注意mysql最新的加密规则、太简单的密码不允许通过