[
  {
    "id": 1,
    "password": "password1",
    "email": "user1@example.com",
    "name": "John",
    "surname": "Doe",
    "nickname": "JD",
    "image": null,
    "extraTime": true,
    "group": 1,
    "roles": [ "Admin", "Teacher" ]
  },
  {
    "id": 2,
    "password": "password2",
    "email": "user2@example.com",
    "name": "Alice",
    "surname": "Smith",
    "nickname": "AS",
    "image": null,
    "extraTime": false,
    "group": 2,
    "roles": [ "Student" ]
  },
  {
    "id": 3,
    "password": "password3",
    "email": "user3@example.com",
    "name": "Bob",
    "surname": "Johnson",
    "nickname": "BJ",
    "image": null,
    "extraTime": true,
    "group": 3,
    "roles": [ "Teacher" ]
  }
]