Manage MySql users

Create user

CREATE USER 'newuser'@'%' IDENTIFIED BY 'password';

Grant privileges

-- Grant all privileges including the grant option (basically an additional root user)
GRANT ALL PRIVILEGES ON * . * TO 'newuser'@'%' WITH GRANT OPTION;
 
-- Grant all privileges
GRANT ALL PRIVILEGES ON * . * TO 'newuser'@'%';
 
-- Grant read-only privileges
GRANT SELECT ON *.* TO 'newuser'@'%';

Flush privileges

FLUSH PRIVILEGES;

Change password

SET PASSWORD FOR 'user'@'localhost' = 'NewPassword';

ALTER USER 'username'@'ip_address' IDENTIFIED WITH mysql_native_password BY 'password';