This article will show the steps on how you manage the database user privilege, update MySQL Database.
1) Login into your server’s cPanel and look for the category “Databases”. Click the “MySQL@Databases”.
2) Click on the database user under the ” Current Databases ” section table.
3) Manage and update the MySQL User privileges by tick or untick on the small boxes. 
4) Click ” Make Changes ” to save it and you’re sucessfully update MyQSL user privilege.
Please refer to the following article to know more.
Knowledge Base: What is the port does MySQL use?