I recently purchased a soundbar 700 and set up Alexa as the integrated virtual assistant. I already have several Amazon Echo devices and several Soundtouch speakers which are controlled via the Alexa skill. I am a Spotify premium user and this is linked and selected as the default music service in the Alexa app. When I ask Alexa to play something from Spotify, via the soundbar, I am told that this isn't supported. Am I don't something wrong?