Some Tries to Access my Account

Banning by IP address is a time consuming and ineffective way to approach or protect against this type of attack. The reason it is not effective is IP addresses are easily changed automatically by hackerbots. ie you block an IP address the bot automatically switches to another IP address (with millions of IP addresses to switch to), etc etc etc etc……

See these links for how the hacker got your user account/author name and what to do to prevent this in the future:
https://forum.ait-pro.com/forums/topic/revealing-the-admin-or-editor-user-name-and-not-knowing/
https://forum.ait-pro.com/forums/topic/wordpress-author-enumeration-bot-probe-protection-author-id-user-id/
https://forum.ait-pro.com/forums/topic/protect-login-page-from-brute-force-login-attacks/

Assuming this answered all questions – thread has been resolved. If you have additional questions about this specific topic please post those questions.