system/list

{
    "code": 200,
    "message": "List all systems for user_id xxxx",
    "data": {
        "user_id": "xxxx",
        "systems": [
            {
                "system_id": "PVXXX1",
                "name": "Example PV System Berlin",
                "city": "Berlin",
                "country": "Germany",
                "year": 2023,
                "kWp": 20,
                "latitude": 52.52,
                "longitude": 13.38
            },
            {
                "system_id": "PVXXX2",
                "name": "Example PV System Munich",
                "city": "München",
                "country": "Germany",
                "year": 2023,
                "kWp": 20,
                "latitude": 48.13,
                "longitude": 11.58
            },
            {
                "system_id": "PVXXX3",
                "name": "Example PV System Amsterdam",
                "city": "Amsterdam",
                "country": "Netherlands",
                "year": 2023,
                "kWp": 20,
                "latitude": 12.5,
                "longitude": 4.89
            }
        ]
    }
}