[]string{
    "Required field 'Name' is not provided",
    "Age must be greater than 18"
}

[]enforcer.Failed {
    enforcer.Failed{
        ResourceType: "name",
        Failed: "required",
    },
    enforcer.Failed{
        ResourceType: "age",
        Failed: "min:18",
    },
}

// utils/generateErrorMessage.js


function generateErrorMessage(resource, failed) {
    return "Appropriate error from failed"
}

type Post struct {
  title               string
  category      string         `enforce:"default:uncategorized"`
  dateAdded  time.Time  `enforce:"beforeValidate:setTimeNow"`
}

func setTimeNow() {
  return time.Now()
}

p := Post{ ... }
errors := enforcer.Validate(p)