The lyftdrivers.perkspot.com portal is a closed portal. Lyft has enabled a feature that requires you to receive an invite in order for your account to be created. PerkSpot will send you an email with the subject line, "Welcome To Your Lyft Discount Program" that will grant you access to the PerkSpot program. This is typically sent within 30 days from the date you unlock Gold.
If you haven't received this invitation email yet, please contact Lyft directly to get a status OR just hold on tight. You should be expecting a welcome email from us shortly.