metadata function returns null

[anker2000]

Using the example from the example folder I added the metadata function to the code like this:

SpotifyModule.playSpotifyURI("spotify:track:12x8gQl2UYcQ3tizSfoPbZ", 0, 0.0, (error) => { if(error) { console.error('Something went wrong') } SpotifyModule.metadata((res)=>{console.log(res);}); });

All I get from the console is null. What am I doing wrong?