SSH automation in jenkins

So I've been working on the automation of processes and it includes fetching data from an external source through DVC(data version control) for which I am using SSH client to pull and push changes. For automation, I'm using Jenkins and the problem I'm facing is that for ssh we need to give a password on runtime, and in automation that's not an option. I've tried multiple ways to specify passwords for ssh like sshpass and ssh config but it turns out Jenkins when building creates some file name script.sh in a directory repoName@tmp in var/lib/jenkins/.... and therefore it is giving permission denied error. no matter what I try. If anyone could give any suggestions to this problem it would be appreciated.