Hi all .
Need a little help .
I've got four echo devices around the house and successful in creating groups and playing multi room .
Now , I've a LG OLED TV WITH SOUND BAR . Here's my problem , can play Spotify through all the devices or through the tv .
How do i connect the tv to the alexa app to add it to the list of devices so I can add the tv to the multi room section and then play through echo devices and tv sound bar together .