Hi! At the beginning of this section you state 'Let’s add some functions to the lib/my_app/auth/auth.ex file to verify a user’s password', but lib/my_app/auth/a

Hi! At the beginning of this section you state 'Let’s add some functions to the lib/my_app/auth/auth.ex file to verify a user’s password', but lib/my_app/auth/auth.ex was never created in the previous sections of the tutorial. Please indicate if it needs to be created, or if it's creation is done somewhere else. Thanks!