Is it possible to send a SharedSecret in the outbound PO cxml ?

Hi,

We are in the process of setting up a new supplier to send outbound cXML POs via OBN. They have requested that we include a SharedSecret, which they will use to verify the sending details.

I noticed that in the cXML files we send to other suppliers, there is a SharedSecret attribute in the sender section, but it is not currently populated.

               <Sender>

                  <Credential domain="https://****.oraclecloud.com">

                     <Identity/>

                     <SharedSecret/>

                  </Credential>

                  <UserAgent>OracleB2B</UserAgent>

               </Sender>

Can anyone let me know if it is possible to populate this attribute, and if so, where this can be configured?