curl --request POST \
  --url https://statsigapi.net/console/v1/gates/{id}/overrides \
  --header 'Content-Type: application/json' \
  --header 'STATSIG-API-KEY: <api-key>' \
  --data '{
  "environmentOverrides": [
    {
      "environment": "staging",
      "unitID": "unit123",
      "passingIDs": [
        "id1",
        "id2"
      ],
      "failingIDs": [
        "id3",
        "id4"
      ]
    }
  ]
}'

{
  "passingUserIDs": [
    "passing-user"
  ],
  "failingUserIDs": [
    "failing-user"
  ]
}