Formatting userFullnameAttribute when configuring the Identity Store with LDAP

Anonymous User

Does anyone know how to properly format the JSON when configuring LDAP in portal?

I would like for this to work:

{
 "type": "LDAP",
 "properties": {
 "userPassword": "...",
 "caseSensitive": "false",
 "userEmailAttribute": "mail",
 "usernameAttribute": "mail",
 "user": "...",
 "userFullnameAttribute": {[givenName]&" "&[sn]},
 "ldapURLForUsers": "ldaps://...",
 "isPasswordEncrypted": "true",
 "userSearchAttribute": "mail"
 }
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Particularly this line:

"userFullnameAttribute": "[givenName]&" "&[sn]",<SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN>

Currently our IT has used a cn which would be "Meier,Joel" which doesn't auto fill in the first and last name in Portal.