In the Sdui app, open the settings via the drop-down menu in the top right.

Then select "Add parent" and there the child with whom you would like to link another parent account.

A window opens in which an activation code is displayed. This code is the new activation code for the additional parent and can be shared (for example by email).

With this activation code, the other parent can set up their own Sdui account, which is automatically linked to the selected child.