Question Regarding Smart Value for Asset Object's attribute with Multiple User

[x_y]

Hi,

I created an object type called Application Role, and each object have an attribute called "SysAdmin". SysAdmin is a User type attribute, where I can store all the system admin of each application. Could you please let me know what Smart value should I use to @ all the admin of that object when I want the automation comment on an issue? I have created an assets object type custom field to store the Application Role object.

I have tried {{#issue.customfield_10079.SysAdmin}}
- [~accountid:{{accountId}}]
{{/}} 

But this only work(@ the admin in the comment section) when I only have one user in SysAdmin.

Thanks