Fixed token not being saved

Author: devgianlu

core/src/main/java/xyz/gianlu/librespot/core/TokenProvider.java

@@ -48,6 +48,8 @@ public String get(@NotNull String scope, @Nullable ExpireListener expireListener
         MercuryRequests.KeymasterToken resp = session.mercury().sendSync(MercuryRequests.requestToken(session.deviceId(), scope));
         token = new StoredToken(resp);
 
+        tokens.put(scope, token);
+
         if (expireListener != null)
             token.expireListeners.add(expireListener);