I have to admin that. I forgot password to my router. It is very shameful. When I updated router to latest version of OpenWrt I decided to change password. And I was carefully preparing this update and as result, I did not login to my router after that because everything working just fine. And today, more than month from setting it up I decided to check something. And I realized that I simply forgot password. It was new password that I never used before and I forgot it.

It is my main router, and I can reset router to factory default, but it will be pain to setup it again. As last resort I decided to search internet