[
  {
    "field": "username",
    "special": null,
    "interface": "input",
    "options": null,
    "display": "raw",
    "display_options": null,
    "readonly": 0,
    "hidden": 0,
    "required": 1,
    "sort": 1,
    "width": "full",
    "note": null,
    "conditions": null,
    "validation": null,
    "validation_message": null
  }
]