EVE Technology Lab

I'm probably doing something really stupid, but I have read the docs here and don't know what I'm doing wrong: http://eveonline-third-party-documentation.readthedocs.io/en/latest/sso/authentication.html
I'm trying to use Esipy: https://github.com/Kyria/EsiPy/blob/master/docs/auth.md
I have an app registered, and callback configure, and everything, and I'm trying to do the SSO authorization code flow manually.

First, I obtain the auth uri:

security = EsiSecurity(app=app, redirect_uri='https://evetooling.com/login/complete', client_id='8d3f99624d424d52be8e89838c32fd2d', secret_key='reallysecret')
security.get_auth_uri()

#returns  'https://login.eveonline.com/oauth/authorize?response_type=code&redirect_uri=https%3A%2F%2Fevetooling.com%2Flogin%2Fcomplete&client_id=8d3f99624d424d52be8e89838c32fd2d'

I open that link in my browser, and after login screen I get redirected to something like:
https://evetooling.com/login/complete?code=GHcNuSnb3pFbY9SVi39HUsvZfZw7bFCdkDMXSciMU5MXKuNvAhuSxJu494RF529F0

Now I take that code and copy it here:
curl -H 'Authorization: Basic bm90IGdvbm5hIGdpdmUgeW91IG15IHNlY3JldA==' -X POST --data-urlencode "grant_type=authorization_code" --data-urlencode "code=GHcNuSnb3pFbY9SVi39HUsvZfZw7bFCdkDMXSciMU5MXKuNvAhuSxJu494RF529F0" https://login.eveonline.com/oauth/token

I always get error 400:
{"error":"invalid_request","error_description":"Authorization code not found"}

Any ideas on what might be wrong?

Edit:
Solved by creating a new app on developers page - for some reason my old app credentials are invalid for current SSO