4/30/2020: There is the ability to delete users accounts in Halo and LF Connect apps. See the following video on how a user can delete their account if they no longer wish to use the app.
Halo - Select User (in upper left corner), Settings, Delete Account
LF Connect - Select Menu (in upper left corner), Settings, scroll down to Delete Account
Note: Due to data protection laws, once a user of the app deletes their account using the delete account option, all data relating to that user will be deleted from Life Fitness systems.