How to add person number as a parameter for third-party deep link

Summary:

I would appreciate your help.

I'm trying to pass a person number parameter for a third-party deep link

Person Number:

#{securityContext.employeeNumber}
#{securityContext.userData.personNumber}

When I use this code, I get a null value.

However, I can see the login person's name details. when I used #{securityContext.userName}

Person Name:

#{securityContext.userName}

Https://abc.com&cl=01&emp=#{securityContext.userName}&uc=Vor0001

Can anyone help me with this? How do I pass the personal number?