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Q: Failed to authenticate when signing in .

This happens when the /login request succeeds but the Set-Cookie in the response does not.

Solution 1

When running locally, make sure that AUTH_COOKIE_SECURE is False in your env file.

Solution 2

When running locally, make sure you are using NOT http://localhost:3000/login

Browsers require at least 2 dots in the url when setting the cookie; hence why the cookie is not being set for localhost.

Solution 3 (OAuth)

Redirect URL's do not match. Check that REDIRECT_URL defined in your env file matches what you have defined with your OAuth provider.