Hey @tomamt1234,
You are not passing in a correct userID param.
https://api.zoom.us/v2/users/https:/us04web.zoom.us/j/9386870475/meetings
You need to pass in a userID, userEmail, or the word me.
You can get userIDs and userEmails from the Get Users endpoint.
https://api.zoom.us/v2/users/{userID}/meetings
Thanks,
Tommy