I'm using a dropbox account to save data in my ios app. I don't want to authorize the current user, but I want to use the account associated with my app key to upload to a specific folder location. I've tested this with the api explorer and know that it is possible, but the documentation suggests that the swift sdk only allows authorization through a user signing into their dropbox account. Is it possible to do the upload with the swift sdk or will I need to just stick with the http api?