New Groover accepts an invitation to a room

[stiffneckjim]

As a new user of Team Groove, I want to receive and accept an invitation to Team Groove and to join a room with my friends and colleagues, so we can collaborate on a playlist of tunes and beats that make us happy, productive and content.

Glossary

Station - Team Groove account with one or more rooms, admins and a link to a music service (currently only supporting Spotify)
DJ - super user/account holder for Team Groove instance
Groover - standard user
Room - group of users set up by a DJ with one or playlists
Playlist - group of songs that users can edit and vote on