Implementation of Random Identity Generation

[abhi3700]

Motivation

Developing a method to assign unique IDs (commitments) to users and securely manage their identity secrets (trapdoor & nullifier) in a custodial setup.

Solution

1. Generate a random number.
2. Convert this number to a string.
3. Transform the string to bytes.
4. Shape these bytes into a fixed-length array for Identity::from_secret().