adding spotify api interaction

backend/handlers/handle_spotify.go

@@ -0,0 +1,21 @@
+package handlers
+
+import (
+	"github.com/gin-gonic/gin"
+)
+
+func (store *Store) ListeningTo(c *gin.Context) {
+
+	// Communicate with spotify API
+	// Return if I'm listening to a song
+	return
+}
+
+func (store *Store) SendSong(c *gin.Context) {
+
+	// Communicate with spotify API
+	// Play song on spotify
+	// Disallow new song for duration of song
+
+	return
+}