[gostsamo]

sso, I think. you cannot authenticate with a Google, FB, or Apple account.

[algesten]

That's not how that works. One common way here is OAuth2 which includes a callback URL such as:

https://internal.yourcompany.com/oauth2/callback?token…

That token in the callback does not require any kind of cookie to use for subsequent authenticated calls.

[IMTDb]

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