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OAuth++ Docs

The embedded browser flow is using the web browser plugin developed by Epic Games. This plugin allows the creation of a web browser inside your game. Therefore, it is possible to use this to perform the OpenID or OAuth2 flows. This is less secure than using the external browser method.

sequenceDiagram
    UE Game ->> UE5 OpenID Client: Login
    UE5 OpenID Client ->> UE5 OpenID Client: Open Login URL in embedded browser
    UE5 OpenID Client ->> EndUser: OpenID Flow
    EndUser ->> UE5 OpenID Client: OpenID Flow
    UE5 OpenID Client ->> UE5 OpenID Client: Retrieve Token + ID_Token from browser URL
    UE5 OpenID Client ->> UE5 OpenID Client: Add Token to all future requests made via HttpModule
    UE5 OpenID Client ->> UE Game: User
    UE Game ->> UE5 OpenID Client: Remove WebBrowser Widget

To use this flow, simply call the login method as in the following example. Keep in mind to replace the Clinet ID with the proper value. For more information refer to providers. You also need to create an web browser widget containing only an OAuth++ Web Browser.