Always return user fields from DB upon insert_or_update
Always return user fields from DB upon insert_or_update

  - ensures we read the completed_retros_count after writes, otherwise we can get nils back from the in-memory struct
  - 'user.completed_retros_count => nil' surfaced in test cases, but this could also bite us upon updates/creations in the app

stride-nyc/remote_retro,stride-nyc/remote_retro,stride-nyc/remote_retro