This function returns the user names (not be confused with full user name) of those active users playing a project role with the name projectRoleName in the current issue's project.
Parameter projectRoleName can be a comma-separated list of project role names, returning the users that play any of the project roles.
usersInRole(string projectRoleName) #Output: Text list
Variant where you additionally define projectKey.
usersInRole(string projectRoleName, string projectKey) #Output: Text list