List user sessions

curl --request POST \
  --url https://api.fluxer.app/v1/admin/users/list-sessions \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "user_id": "<string>"
}
'

{
  "sessions": [
    {
      "session_id_hash": "<string>",
      "created_at": "<string>",
      "approx_last_used_at": "<string>",
      "client_ip": "<string>",
      "client_ip_reverse": "<string>",
      "client_os": "<string>",
      "client_platform": "<string>",
      "client_location": "<string>"
    }
  ]
}