More Vault API Samples

- Updated Samples for Vault APIs
- Updated Payment Execute to be more verbose
- Delete Plan Sample Update
- Fixes #168

sample/vault/GetBankAccount.php

@@ -0,0 +1,25 @@
+<?php
+
+// # Get Bank Account Sample
+// The Bank Account resource allows you to
+// retrieve previously saved Bank Accounts.
+// API called: '/v1/vault/bank-accounts'
+
+// The following code takes you through
+// the process of retrieving a saved Bank Account
+
+/** @var \PayPal\Api\BankAccount $bankAccount */
+$bankAccount = require 'CreateBankAccount.php';
+
+/// ### Retrieve Bank Account
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $bankAccount = \PayPal\Api\BankAccount::get($bankAccount->getId(), $apiContext);
+} catch (Exception $ex) {
+    ResultPrinter::printError("Get Bank Account", "Bank Account", $bankAccount->getId(), null, $ex);
+    exit(1);
+}
+
+ResultPrinter::printResult("Get Bank Account", "Bank Account", $bankAccount->getId(), null, $bankAccount);
+
+return $bankAccount;