If you choose not to allow root to log in, then a user account will be created and given the power to become root using the 'sudo' command.
Ma yella tferneḍ ur tsirigeḍ ara anekcum i uẓar, ad yettwarnu umiḍan n useqdac yerna ad yesɛu tazmert ad yuɣal d aẓar s useqdec n tladna "sudo".