Divination on a bard

Suppose a bard uses Magical Secrets to take the spell Divination:

Your magic and an offering put you in contact with a god or a god’s servants. You ask a single question concerning a specific goal, event, or activity to occur within 7 days

Who or what being would they be asking? If they are a believer in a god then I assume the given god, however, how/who would an agnostic/atheist type bard contact?