The following parameters are available :
- Databases
- The databases to which access is allowed. This can be an SQL regexp
    if desired. 
 
- Username
- The user allowed to access the above database. This user must already
    exist in the User Permissions table. 
 
- Hosts
- The hosts that the user can access the database from. If the option
    From host permissions is chosen, then MySQL should use the
    Host Permissions to control access. 
 
- Permissions
- The MySQL operations the user is allowed to perform on the database.