Repo Key Expired Error for EasyEngine on debian 8

v3
#1

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://download.opensuse.org Release: The following signatures were invalid: KEYEXPIRED 1501595774

W: Failed to fetch http://download.opensuse.org/repositories/home:/rtCamp:/EasyEngine/Debian_8.0/Release

How can I download the correct key?

#2

Just use the command :

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 3050AC3CD2AE6F03
#3