Required information regarding changing of email adress

hallo
hope you are doing well. I have applied for master program molecular plant science with the application number BW-1956242. and register through email address: aishaiftikhar319@gmail.com. but unfortunately i lost my email address and username as well which was save into this email. now I want to change my email address from aishaiftikhar319@gmail.com to iftkharaisha94@gmail.com.

Dear aishaiftikhar.aisha,

Please contact us again via https://www.uni-hamburg.de/en/campuscen ... enter.html.

Best regards,
BK