How to Implement Face Recognition in ios app ? Can Apple provide Face Recognition?

• I am searching related to Face Recognition SDK or any documents. But i can't find any solution of that.
• Here i can get Face Detection and i Know about the detection.
• But i want Implement Face Recognition in my application.
• I Read many documents.but i can't get any proper solution for that.
• I implement login system with Face Recognition.
• So please provide me any Proper Solution for it.

Thanks in Advance.