Hi
First, i didn’t cleaned up my source code. At this point, userAccessToken and appAccessToken are useless.
But the way to get your activities history, make sure you have set the userGarmin variable, the one you use to log you in on garmin connect web site. And I think you have to set you activities “public” by PARAMETERS - “Privacy setting” section.
You can try with my garmin user : scarri77
All my activies are open to a public acces.
https://connect.garmin.com/proxy/activitylist-service/activities/scarri77?start=1&limit=10