customers.json

[
  {
    "id": 1,
    "first_name": "John",
    "surname": "Smith",
    "email": "john@gmail.com",
    "mobile": "0428888731",
    "policies": [
      "motor",
      "property"
    ]
  },
  {
    "id": 2,
    "first_name": "Ken",
    "surname": "Socks",
    "mobile": "0429999731",
    "policies": [
      "motor"
    ]
  },
  {
    "id": 3,
    "first_name": "Jack",
    "surname": "Sun",
    "email": "jack@gmail.com",
    "policies": [
      "property"
    ]
  },
  {
    "id": 4,
    "first_name": "John",
    "surname": "Rain",
    "policies": [
      "motor"
    ]
  },
  {
    "id": 5,
    "first_name": "John",
    "mobile": "0423333731",
    "policies": [
      "motor"
    ]
  },
  {
    "id": 6,
    "first_name": "John",
    "surname": "Smith",
    "mobile": "0422222731",
    "policies": [
      "motor"
    ]
  }
]