How to get full data for salesperson in Zohobook

How to get full data for salesperson in Zohobook

I'm trying to get full data for salesperson but can't do it
I see we can using some ways

  1. salesperson = zoho.books.getRecords("salespersons",organization_id, "zoho_books");

  2. salesperson = zoho.books.getRecordsByID("salespersons",organization_id,salesperson_id,"zoho_books");

  3. params = Map();
  4. params.put("organization_id",organization_id);
  5. params.put("responseFormat","json");
  6. response = invokeurl
  7. [
  8. url :""
  9. type :GET
  10. parameters:params
  11. connection:"zoho_books"
  12. ];
it will return

  1. "code": 57,
  2. "message": "You are not authorized to perform this operation"
  3. }
  4. zoho code": 14, "message": "The request could not be authenticated as the authentication value you entered is invalid. Enter a valid authentication value and try again 
My zoho_books  connections: 

  2. ZohoBooks.bills.All
  3. ZohoBooks.contacts.All
  4. ZohoBooks.custommodules.ALL
  5. ZohoBooks.estimates.All
  6. ZohoBooks.fullaccess.all
  7. ZohoBooks.invoices.All
  8. ZohoBooks.items.All
  9. ZohoBooks.salesorders.All

Do you know which type of scope should I choose?
Another question is how can I get the custom fields of a salesperson?

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