- Host
    - Login
    // Token generated by login used to authenticate next requests
    - Add Music provider(s) [ Spotify, Apple Music, Amazon Music, YT Music, Deezer, SoundCloud ]
        - Music provider access token & refresh token linked to Firebase User
        - Sessions created by host linked to Firebase User and managed through linked access token & refresh token
    - Connect coasters to Fonz Account
- Guest
    - Tap coaster to get session ID
    - Search song
    - Tap coaster again with song ID and music provider (received from step 1)
