create mysql author

DELETE FROM mysql.user WHERE user = 'demo';
flush privileges;
GRANT ALL PRIVILEGES ON *.* TO 'demo'@'localhost' ;
GRANT ALL PRIVILEGES ON *.* TO 'demo'@'localhost' ;
CREATE USER 'demo'@'%' IDENTIFIED BY 'demo' ;
GRANT ALL PRIVILEGES ON *.* TO 'demo'@'%' WITH GRANT OPTION ;
use mysql;
update user set password=password('demo') where user='demo';
flush privileges;
exit;