How can users define their devices in Run environment?

How can users define their devices in Run environment?

@Philippe MARIN

I have difficulties in configuring blueprint dashboard and users, so that they can can connect devices to this dashboard.

I created a Blueprint dashboard, and configured a “Run App”, with a Policy and a " URL domain".
I sent the URL to another user, he did the log in process and I could validate his access.
But now when he connects to the URL he can see my blueprint dashboard, which is empty. He does not see my devices, and he has no way to create a device by himself.
It seems also he cannot reference an existing device he has in environment.
I tried with another user, and also by inviting myself as a user, but the result is the same: I cannot myself connect any device to this dashoard when I log in through the Domain URL.

So I think I missed something.
I found some help and tutorials to create a blueprint dashboard, and to manage users permissions (may be I did it wrong). But I could find nothing that explain the user’s side…
Can you help please?

All the best.