Changes to Issue Invoice

added optional request body

added the required property scheduled_charge_at to the response with the 200 status

removed the required property line_items/items/plan_id from the response with the 200 status

added the required property line_items/items/variant_id to the response with the 200 status

the security scope payment:charge was added to the endpoint's security scheme bearerAuth

the security scope invoice:update was removed from the endpoint's security scheme bearerAuth

added the required property scheduled_send_at to the response with the 200 status

added the required property checkout_link to the response with the 200 status

endpoint added