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Is login hint available under the new Google Identity Services library? #837

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filmerjarred opened this issue Nov 9, 2022 · 1 comment
Open

Is login hint available under the new Google Identity Services library? #837

filmerjarred opened this issue Nov 9, 2022 · 1 comment

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@filmerjarred
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Sorry for posting an issue here, but I couldn't find any repo for the new library.

I'm making an app that connects to a google calender.
I would like make the sign-up and connecting to calender flow as seamless as possible.
My understanding is that this can be done with "login hints":

From the docs at https://developers.google.com/identity/oauth2/web/guides/how-user-authz-works

Adding a hint during authorization initialization--typically the email address of the user's Google Account--enables Google to skip the display of an account chooser, saving users a step. The ID Token credential returned by Sign In With Google contains the user's email address.

From past issues and digging around in the source, it looks I can run the "sign in with google" flow, and then pass an email from that to the authorisation flow like so:

image

This does redirect to a link with "login_hint=EMAIL_FROM_LOGIN_FLOW", but still displays the account selection.

Am I doing something wrong, or is this feature not yet supported in the new library?

Much thanks,

Jarred
@rhashimoto
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Your code sample uses a "hint" property, though the documentation specifies the property name as "login_hint". Nevertheless, it sounds like you're still getting the proper URL param so that's apparently not the problem.

I have tried to bypass the account chooser by setting login_hint to both the user email and the id token sub field. Neither seems to work; I still get the account chooser as you do. I tried both the "popup" and "redirect" ux modes.

I can avoid the account chooser if I use OAuth2Client.generateAuthUrl() on the server side with a login_hint. So that works but isn't ideal because it only supports the redirect flow.

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@rhashimoto @filmerjarred