Hello @...........,
The very first step is to avoid sharing of information (login details or clicking on linking leading to websites asking for your login details for the game ) , and enabling two-factor authentication, such as linking your phone number or any of your emails only you have access to and also regularly review linked devices for any unusual access. Avoid sharing account details, even with friends. These steps should help protect against unauthorized access.
But as i mentioned, please refrain sharing of information related to your game. Thank You!