ZOHO books API to get invoice details doesn't have supplier name,GSTIN etc (Get an invoice)

ZOHO books API to get invoice details doesn't have supplier name,GSTIN etc (Get an invoice)

HI Team,

1.   I am trying to fetch complete information of an invoice raised in zoho books using API "GET an invoice ". The JSON response doesn't have the following details. Whereas in UI if I export invoices in excel template it has all these details.

Supplier Org Name
Supplier GST Registration Number
Supplier Street Address
Supplier City
Supplier State
Supplier Country
Supplier ZipCode
Supplier Phone
Supplier E-Mail


I tried getting these details in "GET/organisations" end point as well. But no luck, could find these details. Also this approach might not work in case of multiple GSTIN.
So the best way is to get supplier details for each invoice. Please help.

2.   Which API end point provides complete info about my organisation (including list of GSTIN, PAN & bank account details)?