MerchantID KeyFormatCNDDescriptionMerchantIDans..30MMerchantID, assigned by Computop. Additionally this parameter has to be passed in plain language too. MerchantID_REST KeyFormatCNDDescriptionMerchantIDBasicAuth.Usernameans..30MMerchantID, assigned by Computop. Additionally this parameter has to be passed in plain language too.