If you would like to get a login account to the Yellowfin website (portal.yellowfinbi.com), you will need to contact your Customer Success Manager. A Customer Success Manager is created per org, so if you're not sure who it is, just ask the appropriate Yellowfin contact in your office. However, if you're still unsure who your Customer Success Manager is, just shoot an email to support@yellowfin.bi from your company email address and we will get this organised for you.
Related articles;
-What can I access if I have a login to the Yellowfin portal?
-How to reset your portal login account used for the Yellowfin website
-Cannot login to the Yellowfin website