TimeSite Pro has two login pages.
One page is a general login that will require the use of your email address.
The other login page is unique to your TimeSite Pro account and allows you to login via either your user name or your email address.
https://app.timesitepro.com.au/[account id]/Login.aspx where [account id] is a short string that uniquely identifies your company account. You can see this account id in the url in the address bar when you are logged into TimeSite Pro.
It is also the address that is provided to you when you log out of TimeSite Pro and are back at the login screen.