Add getToken() to Payment class to get the EC token from the Approval URL

lib/PayPal/Api/Payment.php

@@ -546,6 +546,18 @@ class Payment extends PayPalResourceModel
     }
 	
 	/**
+     * Get token from Approval Link
+     *
+     * @return null|string
+     */
+	public function getToken()
+	{
+		$parameter_name = "token";
+		parse_str(parse_url($this->getApprovalLink())['query'], $query);
+		return (!isset($query[$parameter_name]) || is_null($query[$parameter_name])) ? null : $query[$parameter_name];
+	}
+	
+    /**
      * Creates and processes a payment. In the JSON request body, include a `payment` object with the intent, payer, and transactions. For PayPal payments, include redirect URLs in the `payment` object.
      *
      * @param ApiContext $apiContext is the APIContext for this call. It can be used to pass dynamic configuration and credentials.