I added Appointments + to my site and wanted to know is it

Hi,
I added Appointments + to my site and wanted to know is it possible that instead of user names for clients there is full name option instead of username?
When I try to add new client I get listings of all my registered users but since they were uploaded by csv import they dont have usernames and passwords but strangely looking lke agata_22299jwdcc_ljdcl and that is a little bit strange for my client. :slight_smile:
Is there a way to bypass that and that I get list of full names for example?