[Post] /api/users/register (add a new user)

[Post] /api/users/login (logs in and returns a token)

[Get] /api/users (return all usernames that have search)

[Post] /api/potlucks/ (adds a potluck)

[Get] /api/potlucks/ (returns all potlucks)

[Get] /api/potlucks/:potluck_id (returns potluck details)

[Put] /api/guests/:guests_id (for updating whether a guest is going or not)