This is the repository to install the unofficial AppImage for Snapclient.
Look in releases, install the appimage then:
chmod +x Snapclient_v0.20.AppImage
The AppImage is now ready to use!
Use the included snapclient.service as an example and add it in .config/systemd/user, then enable it:
systemctl --user enable --now snapclient.service
The software, snapclient, was built in Ubuntu 16.04 (xenial) in a virtulized environement. Please use a modern linux distribution before trying. I'm using Fedora Silverblue 32 for reference.