List leave types

{  "data": [    {      "id": 0,      "effective_on": "2019-08-24",      "balance": 0.1,      "leave_type": {        "id": 0,        "name": "string"      },      "leave_type_policy": {        "id": 0,        "name": "string"      },      "created_at": "2019-08-24T14:15:22Z",      "updated_at": "2019-08-24T14:15:22Z"    }  ]}