How to access Admin login?

I need to change my email address in RingCentral.

I understand that you cannot do this in the app.

However, when I log into the web version of RingCentral, but I do not see an option to log in to the Admin Portal.

Windows 10, Chrome Version 85.0.4183.102 (Official Build) (64-bit)

Can you advise?

Thanks in advance,

Brian Hart