Assets - Allow extended placeholder properties for Jira fields like Reporter

When using palcehoders for a User Picker Jira Field, like Reporter, I would like to populate the placeholder with additional properties, like Username or Email:
currently,
${reporter.id} / ${reporter.key} >>> userKey

${reporter.name} / ${reporter.label} >>> user Full Name

Customers are requesting for:
${reporter.email}  >>> email

${reporter.username}  >>> Username

${reporter.domain} >>> Reporter Domain