MySQL创建用户ERROR 1396 (HY000): Operation CREATE USER failed for ‘XXXX’@’localhost’

MySQL：ERROR 1396 (HY000): Operation CREATE USER failed for 'gituser'@'localhost'

例如：用户gituser密码git12345678

创建一个已经存在过的用户，即使已经执行过 delete from mysql.user where User='gituser'

再重新创建用户也会报错，如下（gituser账号已经存在过的，并且delete删除过）：

mysql> CREATE USER gituser@localhost IDENTIFIED BY 'git12345678';
ERROR 1396 (HY000): Operation CREATE USER failed for 'gituser'@'localhost'

解决方法：（执行完后重新创建用户）

drop user "gituser"@"localhost";