curl --request POST \
  --url https://api.chargeapi.co/v1/drivers/{driver}/attach \
  --header 'Content-Type: application/json' \
  --data '{
  "fleet": "<string>"
}'

{
  "id": null,
  "object": null,
  "created": null,
  "email": null,
  "fleets": null,
  "license_number": null,
  "name": null,
  "phone": null,
  "preferences": {
    "charging_speed": null,
    "currency": null,
    "default_payment_method": null,
    "max_price_per_kwh": null,
    "notifications": null,
    "preferred_charging_stations": null,
    "preferred_cpos": null
  },
  "status": null,
  "updated": null,
  "vehicles": null,
  "wallet_balance": null
}