Use singleton in other places as well

core/scrobbler/scrobbler.go

@@ -32,7 +32,7 @@ type scrobbler struct {
 	playMap *ttlcache.Cache
 }
 
-func New(ds model.DataStore) Scrobbler {
+func GetInstance(ds model.DataStore) Scrobbler {
 	instance := singleton.Get(scrobbler{}, func() interface{} {
 		m := ttlcache.NewCache()
 		m.SkipTTLExtensionOnHit(true)

core/wire_providers.go

@@ -16,6 +16,6 @@ var Set = wire.NewSet(
 	NewCacheWarmer,
 	NewPlayers,
 	transcoder.New,
-	scrobbler.New,
+	scrobbler.GetInstance,
 	NewShare,
 )