curl -X PATCH https://api.mailofly.com/api-keys/key_123456 \
  -H "Authorization: Bearer mf_live_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Staging Backend"
  }'

{
  "data": {
    "id": "key_123456",
    "name": "Staging Backend",
    "secret_suffix": "9aBc",
    "expires_at": null
  }
}