Azure Webapi authentication over Certificate

Hi All

I have tried following example which gets security token over certificate and it worked for me. https://github.com/AzureADSamples/Daemon-CertificateCredential-DotNet/

1. In the security token , i could not find user, if i would like add more certificates and server can identify each of certificate in order to know user.

2. Is there possibility to get Security token by client certificate from Azure active directory for user without using ACS because ACS (JWT format is still beta.)

Thanks

CP