People picker

const picked = await zend.people.pick({ title: "Who do you want to play?", max: 3 });
if (picked.length === 0) return; // the user backed out

const game = await zend.interaction.create({
  type: "challenge",
  participants: picked.map((p) => p.pick),
});

{ appUserId: string; name: string; username: string | null; avatar: string | null; pick: string }