How to stop it from saying “ Are you still watching”.

I just recently stopped using Cable DIRECTV and now I use The DIRECTV on my fire stick  . And when im on the channel about to go to sleep I usually like it when it’s on all night long and it doesn’t turn off until I turn the tv off . But it’s been asking me if I’m still watching when I wake up in the middle of the night how do I stop it from doing that? Please !