You can now add credential layers to your choice in GeoStore.
First of all, click on the “Add layer” button.
Then choose the type of layer and copy the URL of the layer into the Reference part.
Finally, you need simply give a name to your new Layer. If this requires a login/password you can enter them by activating the “Access code” part and inserting your login and password.
An example for the OneAtlas layer is given below: