My users are not connecting w/ fitbit all of a sudden -
Message
Error: invalid_grant - Refresh token invalid: e060fd5d9eba1f287eacc3e4051277934082d8363105f23b02d26b1de96766e8. Visit https://dev.fitbit.com/docs/oauth2 for more information on the Fitbit Web API authorization process.
Thoughts?