Aadhar Verification Queries

I have following questions:

What all data can we store on our servers after a successfull request?
What are various rules/regulations, if any, are needed to be followed while using these APIs?
For how long does Cashfree keep the data on their Servers?
If I validate an Aadhar using APIs will I be able to see the same requested data on Cashfree portal itself or is it just through APIs?