userid user_type            username   capabilities provider       avatar_url 
1      hacker|repo|streamer codegirl   1,2,3,4,5    twitch|github  ...

capability_id capability_name
1             join_hacka
2             

hackathon_id hackathon_name owner_id
1            something cool 1

hackathon_cap
id capabilities_id hackathon_id
1     

participants
userid, hackathon_id

# ACTUAL TODOS
- handle refreshing tokens