you should create sql users in the master database
CREATE USER 'root'@'s2' IDENTIFIED BY 'myrootpassword';
GRANT ALL PRIVILEGES ON * . * TO 'root'@'s2' IDENTIFIED BY 'myrootpassword' WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0 ;
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