Dear Shopify Partner Support Team,
We are currently planning to develop a Flow Action Extension to integrate Shopify Flow with our external API.
We would like to authenticate requests using an API key, and are exploring how users could provide this API key within the Flow Action configuration.
Could you advise on possible implementation options to allow the user to input and store an API key via the Flow UI?
Specifically, we would like to confirm whether the following requirements are supported:
- Can the API key input field be masked (e.g., hidden like a password)?
- Can a user-set API key be reused across multiple Flow workflows, or stored at the app level for reusability?
Thank you very much in advance for your guidance.