Purchase invoice management

• POSTCreate a purchase/api/v2/purchasesaccounting:purchases.write
• POSTCreate a payment for a purchase/api/v2/purchases/{purchaseId}/paymentsaccounting:purchases.write
• POSTApprove a purchase/api/v2/purchases/{purchaseId}/approveaccounting:purchases.write
• POSTAttach a file to a purchase/api/v2/purchases/{purchaseId}/attachmentsaccounting:purchases.write
• POSTCreate a purchase refund/api/v2/purchases/refundaccounting:purchases.write
• PUTUpdate a purchase/api/v2/purchases/{purchaseId}accounting:purchases.write
• PUTSet purchase pipeline/api/v2/purchases/{purchaseId}/pipelineaccounting:purchases.write
• GETList purchase attachments/api/v2/purchases/{purchaseId}/attachmentsaccounting:purchases.read
• GETList purchases/api/v2/purchasesaccounting:purchases.read
• GETGet a purchase/api/v2/purchases/{purchaseId}accounting:purchases.read
• GETGet purchase attachment/api/v2/purchases/{purchaseId}/attachments/{attachmentId}accounting:purchases.read
• GETGet a purchase refund/api/v2/purchases/refund/{purchaseRefundId}accounting:purchases.read
• GETList purchase refunds/api/v2/purchase-refundsaccounting:purchases.read
• DELETEDelete a purchase/api/v2/purchases/{purchaseId}accounting:purchases.write