All authentication to JamSlide is provided through the Spotify application platform. JamSlide does not at any point have access to a user's Spotify password, and authentication tokens are not retained in any form after a user is successfully signed in. A user's playlist information is not saved after it is used to transfer a user's library to Apple Music.
JamSlide only has access to information directly provided by users to the application. No user data is retained after each session. A user's information is never uploaded to any external JamSlide servers, during or after playlist transfer.