Add user for mysql. Please refer to the official documentation of mysql. 6.3.2 Adding User Accounts
wrote
mysql> use mysql;
mysql> select * from user where user='kanpiaoxue'\G
-- delete user
mysql> DROP USER 'kanpiaoxue'@'%';
-- create user
mysql> CREATE USER 'kanpiaoxue'@'%' IDENTIFIED BY '123456';
-- Authorize
mysql> GRANT ALL PRIVILEGES ON *.* TO 'kanpiaoxue'@'%' WITH GRANT OPTION;
-- Refresh privileges, take effect immediately
mysql> flush privileges;
mysql> select * from user where user='kanpiaoxue'\G
-- delete user
mysql> DROP USER 'kanpiaoxue'@'%';
-- create user
mysql> CREATE USER 'kanpiaoxue'@'%' IDENTIFIED BY '123456';
-- Authorize
mysql> GRANT ALL PRIVILEGES ON *.* TO 'kanpiaoxue'@'%' WITH GRANT OPTION;
-- Refresh privileges, take effect immediately
mysql> flush privileges;