xamarin forms: how to make native login with facebook [ios] - xamarin

in xamarin forms i've succesfully make the facebook login in android with this tutorial
Xamarin forms facebook login android
Anyone has a tutorial to make native login in ios with xamarin forms? I know that i have to make a custom renderer, but i don't know the exact code.
Thanks

I would use the Xamarin.Auth component. Here is the step by step process and code.
https://components.xamarin.com/gettingstarted/xamarin.auth

See here Native login
Then you could make a native login button as Mike James does here

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If you need to access the underlying native controls and their properties, methods and events, you do that with custom renderers.
I'm glad I found this because I don't think I could of done it on my own.
https://github.com/mhaggag/XFAndroidFullScreenWebView/tree/master/XFAndroidFullScreen/XFAndroidFullScreen

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Look at this article:
https://medium.com/#didourebai/authentication-with-google-using-xamarin-forms-403-thats-an-error-disallowed-useragent-fcaadad6f01a
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https://github.com/xamarin/Xamarin.Auth

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Make sure you go through this link and this for implementing a Facebook Login. Cheers!

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I am newbie in Xamarin, and Iwould like to have a Google login in my new app with Xamarin Forms.
What is the right way? Is there any updated tutorial or video to guide? Where to start?
thanks
Apart from the link mentioned by #JamesMontemagno (he is the best!), you can watch the video by Houssem Dellai for the same.
There is a also Xamarin cross-platform component for the same.
Video: https://youtu.be/AgFIsVr26zg
GitHub: https://github.com/HoussemDellai/Google-Login-Xamarin-Forms/tree/master/GoogleLogin/GoogleLogin/Views
Hope it helps. Let me know.

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