Apple tv

What code are you referring to?

What were you doing, what was happening, right before you were asked for a code?

Is this on your Samsung TV?

When using the Apple TV app, users should sign in through the in-app Settings (sprockets wheel icon), the going to Accounts, then entering their Apple ID account and password. Users may be asked once for a two-factor authentication verification code (if this is activated). This code would be send to their trusted Apple devices or else a trusted phone number, as the user has specified for their account.

Apple ID support - Official Apple Support

Manage your Apple ID - Apple

Two-factor authentication for Apple ID - Apple Support

Get a verification code and sign in with two-factor authentication - Apple Support