List Admin Roles

{  "items": [    {      "id": "string",      "name": "string",      "description": "string",      "capability_count": 0,      "system_kind": "string",      "created_at": "2019-08-24T14:15:22Z",      "updated_at": "2019-08-24T14:15:22Z"    }  ],  "total": 0,  "limit": 0,  "offset": 0}

{  "detail": [    {      "loc": [        "string"      ],      "msg": "string",      "type": "string",      "input": null,      "ctx": {}    }  ]}