I am trying to deploy a rails site online using the steps in https://gorails.com/deploy/ubuntu/18.04 but when I run cap production deploy I receive, What can I do to fix it please, I am using aws cloud 9
deploy@93.188.163.140's password:
00:00 git: wrapper
      01 mkdir -p /tmp
    ✔ 01 deploy@X.X.X.X 0.158s
      Uploading /tmp/git-ssh-young-production-ubuntu.sh 100.0%
      02 chmod 700 /tmp/git-ssh-young-production-ubuntu.sh
    ✔ 02 deploy@93.188.163.140 0.156s
00:00 git:check
      01 git ls-remote git@github.com:oomis/young.git HEAD
      01 Warning: Permanently added the RSA host key for IP address '140.82.113.4' to the list of known hosts.
      01 git@github.com: Permission denied (publickey).
      01 fatal: Could not read from remote repository.
      01
      01 Please make sure you have the correct access rights
      01 and the repository exists.
#<Thread:0x0000564f38e1cb38@/home/ubuntu/.rvm/gems/ruby-2.6.3/gems/sshkit-1.20.0/lib/sshkit/runners/parallel.rb:10 run> terminated with exception (report_on_exception is true):
Traceback (most recent call last):
        13: from /home/ubuntu/.rvm/gems/ruby-2.6.3/gems/sshkit-1.20.0/lib/sshkit/runners/parallel.rb:12:in `block (2 levels) in execute'
.```
I expect it to deploy my app, how can I fix this, please
 
    