How do I delete a single string value from a CDT with a nested string array?

How do I delete a single string value from a CDT with a nested string array?https://community.appian.com/discussions/f/general/27179/how-do-i-delete-a-single-string-value-from-a-cdt-with-a-nested-string-arraythis is my cdt i dont know how can i delete a username for the usernames field in the db.en-USTelligent Community 12