When trying to clone a remote repo with Rugged, I keep getting the error `Failed to authenticate SSH session: Unable to open public key file` I add my ssh credentials fine, but when I come to doing the clone the above error occurs. ``` cred = Rugged::Credentials::SshKey.new({username: 'gabriel403', publickey: publickey, privatekey: privatekey}) Rails.logger.debug cred ``` Where publickey and privatekey are string holding the keys. ``` repo = Rugged::Repository.clone_at('git@github.com:gabriel403/dotfiles.git', '/tmp/dotfiles', {credentials: cred}) Rails.logger.debug repo ```