Login failed with Facebook

[Hypercookie]

When starting a party in browser Spotify asks me to log in.Since my Spotify Premium account is linked to Facebook ,I have to log in with Facebook.Everything seems to work fine and I'm redirected back to Festify.But there I get the Error Massage "Token exchange failed with unknown: Failed to update user.."
I tried deleting my Cookies and Cache , removed Festify completly inside the allowed Apps from Spotify , nothing worked.

[NeoLegends]

Hey, thanks for the report!

Unfortunately, I can't see anything in the server logs from our side so I'm afraid I'll need some more help from you. :)

Could you try logging in again while having the developer console open and post the output here?
In Chrome: Right Click > Inspect Element > Console Tab. You might wanna turn on 'Preserve Log' to be able to follow through the redirects. Settings Cogwheel on Console Tab > Check Preserve Log.

[Hypercookie]

there you go

[NeoLegends]

Hmm, that ain't too useful. But I've updated our server to write all kinds of errors (including yours) to the logs. Could you try the exact same thing again?

[Hypercookie]

Did it.The log looks a little bit different so I appended it

[NeoLegends]

Hmm, seems like our systems don't like the Email address we're getting from Spotify. I'll take a look. :) Meanwhile, could you email (mail+git@festify.rocks) us the Email address you use for facebook?

[Hypercookie]

thats such a thing.Spotify also dont like the email adress.The problem is that i have an mobile Facebook account ,this means i dont have an email adress just a mobile number.After I realised that this is a problem I
added an email adress to Facebook which Spotify is ignoring sucessfully.

[NeoLegends]

So Spotify also had issues with your E-Mail address?

[Hypercookie]

not exactly ...when I login to spotify trough Facebook everything works fine.But when I try to make a Device Password for some devices such as an Raspi or something like this , spotify reports a problem with my emailadress because they try to email me the password,but obviously they can't.

[NeoLegends]

Could you try logging in once more?

[Hypercookie]

Still an error , but another :
"Token exchange failed with invalid-argument: null is not a valid email address"

[NeoLegends]

Ahh. Matches the behavior you're describing with creating custom account passwords. Spotify doesn't have an email for your account so it cannot give it to us, which causes the errors you're seeing.

Is there an email registered when you go to your account page (https://www.spotify.com/us/account/overview/)? If not, simply enter one and the problems should be gone and you should be able to use Festify. If there is one, well... I'm afraid we can't do anything about this for the moment then.

@leolabs Do we actually need an email addresses for the user accounts? I think we're not using them at the moment (so we might be able to go without), but #154 is probably going to need valid addresses, isn't it?

[Hypercookie]

I cant see an adress and when I click on edit profile the field under "Email" stays grey.I think Im gonna talk to the Spotify Guys a bit.But thank you