Azure App Service and Azure AD Authentication
https://learn.microsoft.com/en-us/azure/app-service/configure-authentication-provider-aad
https://learn.microsoft.com/en-us/azure/app-service/scenario-secure-app-authentication-app-service
https://learn.microsoft.com/en-us/azure/app-service/configure-authentication-customize-sign-in-out
https://learn.microsoft.com/en-us/azure/app-service/configure-authentication-user-identities