I'm using your authentication api to register all my users and everything worked fine since yesterday. I just launced a big ad campaign and suddenly no new users or current ones can sign in and all the api returns are: 400 - 'invalid_request' without any error description or ENOTFOUND accounts.spotify.com. This happens when I'm requesting the authorization_code via: https://accounts.spotify.com/api/token.
But as I said everything worked fine since yesterday.
What is wrong?
I sincerely hope you can help me out. I'm losing users by the minute.