Hello, the “username” refers to the name you registered with, while the “applicant number” is the number you receive when applying for the tryout. Each time you participate tryout campaign you’ll be assigned a unique application number to confirm your successful participation. The information you leave matches your username and email. When we announce the results, both the applicant number and the hidden email (to protect privacy) will be shared to confirm the selected testers and then to collect the tester’s address. We’ve tried to make the process transparent and fair based on the rules we’ve set. Hope this helps!