Permission denied (publickey,gssapi-keyex,gssapi-with-mic). fatal: Could not read from remote repo

[Bismaya Kumar Biswal]

Hello i'm getting below error from jenkin build  log. can anyone please help me on this. i have added the public key to the git server which i have generated through ssh-keygen. still getting this error. 

Fetching changes from the remote Git repository

***************************************************************************
Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
fatal: Could not read from remote repository.

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

[Nic Brough -Adaptavist-]

Welcome to the Atlassian Community!

This is what it says it is - your account does not have the needed permissions, or you are not giving it valid login details.  Your public key is not valid, or it id for an account that does not have the rights you need.