How to create a portal URL for the Chargebee domain?

Scope

How to construct portal URL for V3 hosted pages?

How to construct portal URL for V2 hosted pages?

Chargebee's checkout provides an out-of-the-box customer portal system to help your customers manage their accounts. The portal lets your customers view/update their account details, subscriptions (upgrade/downgrade plans and addons), card details, billing address, past payments, subscription details, shipping address (if present), and cancel their subscriptions themselves.

The portal is hosted under " .chargebeeportal.com" and is enabled by default.