listProjectVariables

{
    "pagination": {
        "page": 1,
        "page_size": 20,
        "total_records": 32
    },
    "filter": {
        "keyword": "sample keyword"
    },
    "data": [
        {
            "id": "00000000-0000-0000-0000-13a120000001",
            "project_id": "00000000-0000-0000-0000-102101ec7001",
            "name": "sample custom variable name",
            "type": 0,
            "sample_value": "sample custom variable value"
        }
    ]
}