Authentication Custom ID Link

[Frantasad]

Hi, i am creating cross platform game and i am using UGS authentication. One of my platforms requires to use 3rd party accounts, so i decided to use CustomID sign in, but i cannot find how can i link custom ID to an existing acount? Does anybody here have any experience with that, and isnit even possible? The docs only mention sign in Custom ID sign-in

Thanks anyone that can help.

[Charity_2]

I recently had to implement OAuth login with the Custom ID sign-in method.

It requires a Node.js backend express server.

Here’s the full tutorial I wrote on Unity Discussions:

Implementing OAuth with Custom ID with the Unity Authentication package using a Node.js Backend + Access token verification using jwks

When I first tried integrating Unity Authentication’s Custom ID flow with a backend, I ran into some challenges. So, I wanted to share a practical example for anyone looking to achieve the same. In this example, we use Google OAuth via Passport.js—even though Google is already a built-in provider in Unity Authentication—because this approach is the easiest way to implement a fully custom backend authentication flow. Before you begin, make sure you visit cloud.unity.com then: Enable Custom ID…

Just send the above discussion to Chat GTP to get started with your setup.

I Hope it helps.

Good Luck!