Change e-mail on educational account

help me don't have en tim
I have an educator account and I am changing school E-mail adress, so I need to change my login email address. How do I do this, or who do I contact?

old email log in:
hans1009@woosuk.ac.kr

New email:
hans1009@mail.woosuk.ac.kr

hans1009@woosuk.ac.kr--> change my log e-mail hans1009@mail.woosuk.ac.kr