Theme login/logout

Hello
I had theme with login and logout buttons and they worked fine, i had change the menus and i touch the code of those buttons, now they aren’t working correctly and the menu isn’t changing for the menu that i wanted , the menu that is one the page should be the menu when you are a anonymous and the menu that is the main now should have also the logout button that i insert him for a while in the header menu.
There is anyway to insert both back in the main menu it their respective menus?

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