Changes to Obtener detalles de un checkout

deleted the header request parameter X-SECRET-KEY

the endpoint scheme security secretKey was added to the API

api operation id get-checkout removed and replaced with checkouts_getCheckout

added the optional property application_fee_amount to the response with the 200 status

added the optional property application_fee_percent to the response with the 200 status

added the optional property bank_transfer_memo to the response with the 200 status