data.example

{
  "users": [
    {
      "_id": {
        "$oid": "62b5bc2609f4b17f913c003e"
      },
      "email": "jaroslav.metelka@seznam.cz",
      "password": "123456",
      "registrationDate": {
        "$date": {
          "$numberLong": "1656077349947"
        }
      },
      "username": "Jaroslav Metelka"
    },
    {
      "_id": {
        "$oid": "62b5bc2609f4b17f913c0040"
      },
      "email": "cervenacek@seznam.cz",
      "password": "123456",
      "registrationDate": {
        "$date": {
          "$numberLong": "1656077349947"
        }
      },
      "username": "Červenáček"
    },
    {
      "_id": {
        "$oid": "62b5bc2609f4b17f913c0041"
      },
      "email": "rychlonozka@seznam.com",
      "password": "123456",
      "registrationDate": {
        "$date": {
          "$numberLong": "1656077349947"
        }
      },
      "username": "Rychlonožka"
    },
    {
      "_id": {
        "$oid": "62b5bc2609f4b17f913c003d"
      },
      "email": "mirek.dusin@seznam.cz",
      "password": "123456",
      "registrationDate": {
        "$date": {
          "$numberLong": "1656077349947"
        }
      },
      "username": "Mirek Dušín"
    },
    {
      "_id": {
        "$oid": "62b5bc2609f4b17f913c003f"
      },
      "email": "jindrich.hojer@seznam.cz",
      "password": "123456",
      "registrationDate": {
        "$date": {
          "$numberLong": "1656077349947"
        }
      },
      "username": "Jindra Hojer"
    }
  ],
  "dragons": [
    {
      "_id": {
        "$oid": "62b5bbc8cc2ea485a5a9ce10"
      },
      "name": "Deathwing",
      "image": "https://static.wikia.nocookie.net/wowwiki/images/1/10/Earthwarder.png",
      "damage": 12,
      "health": 12
    },
    {
      "_id": {
        "$oid": "62b5bbc8cc2ea485a5a9ce0f"
      },
      "name": "Ysera",
      "image": "https://static.wikia.nocookie.net/wowpedia/images/1/16/Ysera_of_the_Night_Fae.jpg",
      "damage": 4,
      "health": 12
    },
    {
      "_id": {
        "$oid": "62b5bbc8cc2ea485a5a9ce11"
      },
      "name": "Alexstrasza",
      "image": "https://cdn.gamer-network.net/2019/metabomb/Dragonqueen_Alexstrasza_full.jpg",
      "damage": 8,
      "health": 8
    }
  ]
}