how to show user in mysql code example

Example 1: mysql show users

select * from mysql.user;
#or for less data
select user, host from mysql.user;

Example 2: mysql check user privileges

SHOW GRANTS FOR 'root'@'localhost';

Example 3: SELECT User,Host FROM mysql.user;

SELECT User,Host FROM mysql.user;
DROP USER 'testuser'@'localhost';