Add function that returns token fro api

Author: samuelselasi

0x06-unittests_in_js/6-payment_token.js

@@ -0,0 +1,12 @@
+// function that returns token from api
+/* eslint-disable consistent-return */
+function getPaymentTokenFromAPI(success) {
+  if (success) {
+    return new Promise((resolve) => {
+      resolve({ data: 'Successful response from the API' });
+    });
+  }
+  // Implicitly returns undefined for false
+}
+
+module.exports = getPaymentTokenFromAPI;