Create user in read-only mysql and other only write

Personal wave I am creating a registry system to save in a mysql database. so you need a user with write-only permission (you can only insert but can not select, update, delete, grant) and another user only read (you can only select but not insert, update or delete, grant).

The objective is to guarantee security in the registration system. How do I create these users? I'm using the mysql workbench tool