Not sure how to interpret this result.
Solved! Go to Solution.
The error message says you don't have read permissions. As part of the oauth flow you pass the requested scopes and the athlete can accept whichever ones they feel are appropriate. See https://developers.strava.com/docs/authentication/#detailsaboutrequestingaccess. The token you acquire will only grant access to the scopes the athlete authorized, so make sure you have either read or read_all