If go FORWARD has configured your Google Workspace Email, we would have set up a subdomain in order for you to easily access your email online. If this is the case, the address to check your email would be: http://mail.your_domain_name.co.nz (Note: no www.)
If not, you can access mail using the generic link: http://mail.google.com/a/your_domain_name.co.nz