SampleBusinessAccount SampleApiUsername SampleApiPassword SampleApiSignature SampleApiAuthentication SampleSandboxFlag SampleUseProxy myBusinessAccount@magento.com myApiUsername.magento.com somePassword someApiSignature 0 0 0 someMerchantId DefaultBusinessAccount DefaultApiUsername DefaultApiPassword DefaultApiSignature buyer.mpi@gmail.com 12345678 checkout credit pay buy now pay pal installment horizontal vertical medium large responsive pill rectangle gold blue silver black myBusinessAccount@magento.com myApiUsername.magento.com somePassword someApiSignature someMerchantId