Spotify API: INVALID_APP_ID : <p>I am currently working on an android app which is implementing the Spotify API. I have all of the code connecting my app to spotify using the tutorial and have been working on my app for sometime now. When I play a song through my app after authenticating the user, it works perfectly, that is on my emulator. When I switch it over to my phone it didn't work and gave me an INVALID_APP_ID error in the android response. When I uninstalled spotify off my phone and then tried to login to spotify through my app, I was then able to play music from my phone without any crashes. So my question is how do I fix that? Here is my code for authenticating a user:    </p>

<pre><code>@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);

        // Check if result comes from the correct activity
        if (requestCode == requestcode) {
            AuthenticationResponse response = AuthenticationClient.getResponse(resultCode, intent);
            if (response.getType() == AuthenticationResponse.Type.TOKEN) {
                Config playerConfig = new Config(this, response.getAccessToken(), client_id);
                token = response.getAccessToken();
                Spotify.getPlayer(playerConfig, this, new Player.InitializationObserver() {
                    @Override
                    public void onInitialized(Player player) {
                        mPlayer = player;
                        mPlayer.addConnectionStateCallback(.this);
                        mPlayer.addPlayerNotificationCallback(.this);

                    }

                    @Override
                    public void onError(Throwable throwable) {
                        Log.e("MainActivity", "Could not initialize player: " + throwable.getMessage());
                    }
                });
            }
        }
    }
</code></pre>
