Download songs without password prompt
On your Apple TV, go to Settings → Accounts → iTunes and App Store → Password Settings.
In the section labeled Purchases And In-App Purchases choose the Require Password option.
Now set your preferred level of protection to Never. You can also choose to be reminded to Always enter password for purchases or After 15 Minutes.
Also select Require Password under the Free Downloads section and choose Never to turn off password prompts when downloading free apps from the App Store.


I'm assuming you have a 4th-gen Apple TV.