Please rephrase the question.  You can update that code in a 1/2 dozen ways, so your question doesn't make sense.

Apologies if my previous question wasn't clear.
As a newcomer to Sage 300, I'm currently facing difficulty in locating the "account number" property when adding a new vendor.
I've also attempted to set it using the REST API, but without success. I couldn't even fetch that data...
If there is a straightforward solution that I may have overlooked,
I would greatly appreciate your guidance.
Thank you.

Apologies if my previous question wasn't clear.
As a newcomer to Sage 300, I'm currently facing difficulty in locating the "account number" property when adding a new vendor.
I've also attempted to set it using the REST API, but without success. I couldn't even fetch that data...
If there is a straightforward solution that I may have overlooked,
I would greatly appreciate your guidance.
Thank you.

Vendors don't have "account numbers".  They have Account sets, and Bank Codes.