Repurpose an AT&T TV / DirectTV Stream device

Thank you for the response, My first Wall, is this was an AT&T stream box, so my Directv credentials will not get me to settings, What I read was AT&T Firmware and Directv sites are connected in the firmware. If I can simply get to the Apps and Sideload Directv's Android app then I can sign in with it and the remote should work to operate the TV maybe not the channel functions but wikll not know until I getpast that.