OAuth 2.0 Authorization Code Flow with PKCE allows you to authenticate on behalf of another user with have more control over an application's scopes and improves authorization flows across multiple devices.
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Web-based Facebook Login Alternatives
There are many alternatives to Facebook Login as a web app if you are looking for a replacement. The best Online alternative is Twitter OAuth, which is free. If that doesn't work for you, our users have ranked more than 10 alternatives to Facebook Login, but unfortunately only one of them is available as a web app. If you can't find an alternative you can try to remove all filters.