can't access localhost/wp-admin

hello, i accidently changed within settings->siteurl to something other than localhost. my problem is that i can’t reach my wordpress configurations anymore.
i saw in a post here that i should add 2 lines to my functions.php

update_option( 'siteurl', 'https://sampleurl.com' );
update_option( 'home', 'https://sampleurl.com' );

but, once i did it, even if i erase those 2 lines i get to https://sampleurl.com/…. everytime i try to access : localhost/wp-admin.
if someonce can help me i’d apreciate it A LOT ! i’m stuck on this for few hours already.