feat: Add new Kakao Provider

[esinx]

What kind of change does this PR introduce?

This PR adds Kakao(https://accounts.kakao.com/) as an external provider.

What is the current behavior?

This provider did not exist before.

What is the new behavior?

Based on Kakao developer docs(https://developers.kakao.com/), this PR creates a provider & test suite for Kakao external provider.

Additional context

Please let me know if there are any changes needed, I do acknowledge that this was once mentioned in another comment, but it seemed like the PR had been frozen since then. I wrote my own version to make sure the tests do pass and the features work properly.

[kangmingtay]

Hi @esinx, thanks for the PR, it would be great if you can provide a recording of some sort to show that this works (preferably via loom) and outline the steps needed to set this up. For example, it isn't immediately obvious where i should obtain the GOTRUE_EXTERNAL_KAKAO_CLIENT_ID and GOTRUE_EXTERNAL_KAKAO_SECRET from on the kakao developer portal.

[esinx]

Will post a loom within the next few days :) Thank you so much for reviewing this PR!

[esinx]

Here's a loom of me retrieving a new client ID & secret from the kakao developers page!
@kangmingtay @artifacts3
https://www.loom.com/share/11bc4df13df848d7b4730f5e3906ca48

[igmyung]

May I know when the kakao login feature will be available for supabase auth? I need Kakao Login for a project in progress, and I want to refer to it for my release plan.

[esinx]

@kangmingtay I think this PR is ready to be reviewed-- is there an update on the feedbacks you left? I just pushed a sync that applies the project organization change(folder structure change).

@igmyung
Meanwhile, you can use this docker image if you intend to use Kakao as one of your providers. The tag you are looking for is esinx/gotrue:kakao.

[kangmingtay]

hi @esinx, i think this is good to go! can you please merge in the master branch to fix the failing staticcheck and we can merge it in

[kangmingtay]

oh right, can you also do up some docs on how developers can use kakao as an oauth integration here (https://supabase.com/docs/guides/auth/overview#providers)? should be good as long as it's in the similar format as the rest! thanks @esinx !

[esinx]

My apologies for the delay. I just came back from my mandatory military service, and didn't have much time to go over the changes and the documentations.

@hwr12, thank you for taking the time to complete the documentation! This PR took longer than I've expected due to my unavailability, but I really do appreciate the community effort in trying to complete this PR.

Thank you @kangmingtay also for guiding us on how this PR should be made. Can't wait to see this feature make its way into supabase. Would be really amazing to have Kakao login available for all the Korean users out there.

[github-actions]

🎉 This PR is included in version 2.67.0 🎉

The release is available on GitHub release

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[hwr12]

@kangmingtay
Since the Kakao Auth from mobile supports Kakao Talk App sign in, it would be nice to add support for sign in with id token with Kakao in gotrue.
Do you guys have plans for this feature or will it be accepted when someone PRs this feature?

[kangmingtay]

Hi @hwr12, unfortunately not for now, the sign in with id token endpoint is still experimental but we can consider adding it in the future. We may also consider a webhook-based approach in the future which makes it easier to contribute oauth integrations to gotrue.

[hwr12]

@kangmingtay
I really need this feature right now to continue using supabase as backend for my startup.
I can't think of any walk arounds of this feature lacking id token sign in method.
If PR dedicated to this feature is made, will you accept it?
If you won't, would you mind telling me how I can achieve the same feature using other methods(eg. edge functions)?

[kangmingtay]

@hwr12 Can you explain why you are unable to use the signInWithOAuth() method instead?

[hwr12]

@kangmingtay Becuase calling singInWithOAuth() in flutter would open up browser and makes user to manually enter username and password which can be considered bothersome compared to one click app sign in.
To reduce steps of sign in process, the app should directly interact with Kakao Talk app and retrieve identity token, and using the token to sign in or sign up to my service.

[esinx]

I've achieved such behavior through modifying the link generated by GoTrue. See https://github.com/esinx/RN-Kakao-Login-Gotrue

[hwr12]

Hi @esinx !
Are you referring to this code in the below picture?

Could you explain in detail if you don't mind?

[esinx]

@hwr12 yup you are looking at the right code, and this code will allow you to open the login page using KakaoTalk's deep link. It's just how KakaoTalk works-- the app will handle any link under the host talk-apps.kakao.com.

[hwr12]

@esinx I am confused due to my lack of knowledge but after the login is handled on the Kakao Talk app, is the below code used to continue on signing in to supabase server?

This code looks like doing it manually as I see refresh token and access token are used to set session.
If I understood correctly, the Kakao talk login handling emits refresh token and access token for supabase authentication that are used to set session manually in the app?

[hf]

Hey everyone looking for the ID Token flow. First we need to finish #1108 and then we can add support for Kakao ID tokens.

[hwr12]

Thank you @hf .
I really need this feature ASAP.
Hope to see this feature coming to supabase soon!!

[z3rosmith]

Hi @hf @kangmingtay, I don't mean to bother you, but is there any update on the support for Kakao ID tokens?