If you want the system to start recognising an UNKNOWN team member you can create the member on the members page (person_add) of your web panel and instead of adding images of the member on the Training page go back to the Classify page where you will now be able to class the individual by entering their name under the corresponding images. After you have done that a minimum of 10 times you can now go back to the train page by clicking the face icon next to the team member on the members page and submitting (people_outline).