Hi I am wondering if there is a way to set a user's name using APIs?
The Dropbox API doesn't offer the ability to programmatically set the connected account's user name, but I'll pass this along as a feature request. I can't promise if or when that might be implemented though. For reference, the Dropbox Business API does offer the ability to set a team member's name via the /2/team/members/set_profile_v2 endpoint, but that's only available for Business teams, not individual accounts.