Permission denied (publickey)

[manuelbasil]

Getting permission denied message when cloning relevant-search-book.git. How can this be resolved?
See detailed message below:

$ git clone [email protected]:o19s/relevant-search-book.git
Cloning into 'relevant-search-book'...
[email protected]: Permission denied (publickey).
fatal: Could not read from remote repository.

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