Authenticate your API requests by providing an API key as a value of the
Authorization header. All API requests expect this header to be present.
You can get a new API key within the Organisation settings section of the Flow app by selecting the API Keys tab and pressing Create a new API Token . After that you need to select this API key in Outbound section of your REST API integration in the Flow app and press Save.
Treat API keys with care
Never share keys with other users or applications. Do not publish keys in public code repositories.