[Freeswitch-users] How to check user in directory

Hello! I have a set of local users registered to freeswitch. So, when user is not registered with switch I get USER_NOT_REGISTERED when route call to it. But is there a way to know is user present in directory and not registered, or even isn't in directory? I want to call voicemail in first case and play 'invalid number' message in second. Is this possible? -- Regards, Boris