Rename Label

curl --location --request POST 'https://api.zapmail.ai/api/v2/onebox/rename-label' \
--header 'x-auth-zapmail: YOUR_API_KEY' \
--header 'x-workspace-id: WORKSPACE_UUID' \
--header 'x-service-provider: GOOGLE' \
--header 'Content-Type: application/json' \
--data-raw '{
    "account": "user@example.com",
    "oldLabelName": "Old Label Name",
    "newLabelName": "New Label Name",
    "color": "#00FF00"
  }'