Format and test fixes

api/utils/index.js

@@ -9,7 +9,7 @@ const bcrypt = require(`bcryptjs`);
  * @param {string} message Error message
  * @param {number} code Error code, should be HTTP status code
  */
-const customError = (message, code) => {
+const customError = (message = "An error occurred.", code = 500) => {
 	const error = new Error(message);
 	error.code = code;
 	return error;
@@ -19,7 +19,7 @@ const customError = (message, code) => {
  * Build a custom validation error
  * @param {array[string]} validationErrors Validation errors
  */
-const validationError = (validationErrors) => {
+const validationError = (validationErrors = []) => {
 	let error = new Error("Validation error(s)");
 	error.validationErrors = validationErrors;
 	error.code = 400;