SMJobBless only works with kSMDomainSystemLaunchd, needs kSMDomainUserLaunchd

The docs state that with SMJobBless you can only use kSMDomainSystemLaunchd

SMJobBless(kSMDomainSystemLaunchd, (CFStringRef)label, authRef, (CFErrorRef *)error);

      

        
        
        
      

    

But how do I create a LaunchAgent inside LaunchAgents / in the user library that is executed when the user logs in using SMJobBless or similar approach?