'IOS Share Extension to Cloud Folder

I want to create an IOS share extension that users can use to upload photos to a cloud folder 1. without having to sign in to an account to upload the photo into the cloud folder, and 2. restricting the user from being able to access the contents of the folder. Does anyone know if this can be done? I've looked at using a Google API, but the users still have to sign in to authenticate.



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