I'm trying to use Azure B2C OAuth for Alexa account linking with implicit flow.Below is the redirect url from Alexa
But adding this gives below error in Azure B2C app.
Failed to update xxx-xxxxxxapp application. Error detail: URL may not contain a query string
I tried below link for solving this but its not working https://blogs.aaddevsup.xyz/2018/04/query-string-is-not-allowed-in-redirect_uri-for-azure-ad/
I also tried auth code grant flow with SPA in B2C. That is also not working with Alexa as it has PKCE - https://github.com/MicrosoftDocs/azure-docs/issues/64073. I have to use Azure AD B2C. Any idea how to set up PKCE in Alexa account linking
Anyone succeeded in creating this?