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Custom Auth Provider using Owin OpenIdConnect middleware

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    Context:  DNN 9.2.2 - Custom Auth Provider module implementing Owin Startup class for OpenIdConnect authentication with external Identity Provider.  The grant type is hybrid, and the response type is "code id_token"

    Issue:  The IdP backchannel callback to the Owin /signin-oidc route is being intercepted by the module's Page_Load method, or receive a 404 not found depending on if I set the RedirectUri to "https://dnndev.me/login/signin-oidc", or "https://dnndev.me/signin-oidc".

    The exact same Owin startup class is working fine in a basic test asp.net forms website.  The custom DNN module's implementation of the Startup class is also working, in so much that Owin RedirectToIdentityProviderNotification is raised.

    Question:  How can I get DNN to honor the IdP callback to /signin-oidc so that Owin can receive the Form Post on the backchannel.

    Happy to provide more information if needed.  Please help :)



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