api error responses

error.js

{
  error: {
    message: "One or more fields appear to be incorrect", // this is the main error message to show users (e.g. at the top of the form)
    developer_message: "This is a message for developers to help diagnose the problem", // optional
    reasons: [
      {
        param: "email",
        message: "Please enter a valid email address",
      },
      {
        param: "zip",
        message: "Please enter a valid zip code",
      }
    ] // can be an empty array
  }
}