MockMembership generates a mocking membership.

NewEmptyPassportClaims creates an empty PassportClaims in places where user is not logged-in while we want to access some default value of Live field.

StmtLockMember builds SQL to retrieve membership in a transaction.

AddOnInvoiceCreated is the result of manually adding an invoice.

Invoice is the result of a successfully paid order.

Membership contains a user's membership details This is actually called subscription by Stripe.

MembershipVersioned stores a specific version of membership.

UserIDs is used to identify an FTC user.

Wechat contain the essential data to identify a wechat user.