600fea23bb
Adds `create_stripe_checkout_session` to BillingSession abstract class, which is then used in all places where a stripe.checkout.Session and Session were created: start_retry_payment_intent_session, start_card_update_stripe_session, and setup_upgrade_checkout_session_and_payment_intent. Adds a `billing_session_url` abstract property to the BillingSession abstract class and for the RealmBillingSession child class sets that value to `self.realm.uri`.
Zulip overview
Zulip is an open-source team collaboration tool with unique topic-based threading that combines the best of email and chat to make remote work productive and delightful. Fortune 500 companies, leading open source projects, and thousands of other organizations use Zulip every day. Zulip is the only modern team chat app that is designed for both live and asynchronous conversations.
Zulip is built by a distributed community of developers from all around the world, with 74+ people who have each contributed 100+ commits. With over 1000 contributors merging over 500 commits a month, Zulip is the largest and fastest growing open source team chat project.
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