If you are running #Fedora31 #Linux you might have stumbled about this problem: The Nextcloud client is asking you to log in to your Nextcloud server each time you log into Gnome.
Fortunately this problem can quickly be solved by installing libgnome-keyring. So, next time you install the Nextcloud client, just include libgnome-keyring like this:
sudo dnf install libgnome-keyring nextcloud-client
A restart or logout/login might be necessary to make this work.