This module is in charge of settings up passport for our various authentication methods Twitch_strategy - If twitch returns with a user with user id that already exists we - we sign the user in. If it returns with a user id that we do not have - we create a new user. Otherwise - indication that an error occured. Google strategy If youtube returns with a user id that already exists we sign the user in. If it returns with a new user id - we use the youtube API to retrieve the google account's linked youtube account. We then create a new user Otherwise - indication that an error occured. Facebook Strategy If twitch returns with a user with user id that already exists we - we sign the user in. If it returns with a user id that we do not have - we create a new user. Otherwise - indication that an error occured.