I develop the App to authenticate using Touch ID.
I want to know what fingerprint is used to authenticate when many fingerprints enrolled in iPhone.
For example, I enrolled fingerprints (finger1, finger2, finger3) and process authentication.
In this case, I want to obtain unique fingerprint identifier like ID1, ID2, ID3.
But supporting Touch ID APIs just notice that authentication is successful or not.
How can I identify what fingerprint is used to authenticate?