I am configuring googles authentication with cognito but can't get to work the localhost domain with the integration. Everytime I put localhost on Allowed callback URLs, I get a 403 error page even though the input says that localhost is valid:
The localhost is also configured on Google's side:
But if I access the Hosted UI this error is shown (with a custom integration I also get an error):
Also try https instead of http but with the same result.
I know is something with localhost because when its removed from the list, everything works.
Is this normal?, or maybe am blind and missing something obvious?