Ruuvi-station-influx-gateway installation fails: permission denied

I followed this quide

but it fails in step 4 1. Clone the repository with

git clone`

and I get following error:

base) linttu@linttu-VirtualBox:~$ git clone
Cloning into ‘ruuvi-station-influx-gateway’… Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

Maybe you haven’t set up your GitHub keys? Try
git clone