Enable developer console in browser and navigate to:
Look for the response of POST request in the network tab of developer console: https://www.facebook.com/v2.6/dialog/oauth/confirm?dpr=1 it contains the access token parameter. Just search for 'access_token' in the response. For the lazy people (like myself) i made a small helper that parses the token from response https://taseppa.github.io/tokenparser.github.io/
Kind of unrelated, but does anyone have an updated Tinder API spec? I built a Tinder desktop client a few years ago. I don't use Tinder anymore, but someone reached out to me recently expressing interest in using the client so I'd like to fix it if possible. I fixed the auth problem using the URL @FavyTeam suggested, but the api library I used seems to have an out of date Tinder API.
See dhharris/pinder#3