insert into mysql.user values(...)

CREATE USER 'antichat'@'%' IDENTIFIED BY '****';

GRANT ALL PRIVILEGES ON * . * TO 'antichat'@'%' IDENTIFIED BY '****' WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0 ;