Here’s what the Flux documentation says about sharing a project:
“Share your project with other team members or make it public. Flux gives you full control over who has access to your project.
Summary
Using the share menu, you can control who has access to your project. Every project is private by default, meaning that only you have access to it. Anyone with access to your project can open it with the URL.
Share menu
The default share dialog has three main components:
Copy link: this link allows users with the right permission to access your project.
Embed iframe: This snippet allows you to embed a Flux project in another website.
General permissions: sets permissions to every user. User-specific permissions are managed through the Advanced share menu.