Problem with Go2_rviz.launch

Hello, I am trying to load the Go2 model to visualize it in RViz. However, when I follow the instructions from the go2_description package and attempt to clone the repository using the command:
`git` clone `git@github.com:unitreerobotics/go2_urdf.git`
I keep getting an error saying that the repository is either private or does not exist. Could someone please help me with this?