Optional: Date of Registration, Subcontractor, Pay Rate, Contact, SIA Number, Service Type, SIA Expiry, DOB, Email, Username, Address with Post Code, Address Group, Account Name, Sort Code, Account Number, NI Number, Visa Status, Visa Expiry Date
Full Name will be split into First and Last name automatically
If Subcontractor name is provided but doesn't exist, a new subcontractor will be created
User Account Creation: If Username is provided, a user account will be created with default password "password123". Username must be a valid email address.
Date formats supported: "02-Aug-24", "02-Aug-2024", standard date formats
Remaining SIA/VISA days are calculated automatically if expiry dates are provided
