Please make sure that you are logged in the system, if you are signed in, your user name or e-mail address will be shown at the top right corner of your screen:
If you are not logged in, you will see a link for you to log in:
Note. You cannot log in with two different accounts in the same browser, please log out with one account first then log in with another account, or please open in an incognito window or another browser to do it.