CentOS 8.0 template

[gudge25]

hi there
trying to use CentOS 8.0 template from
Xen Hub /#/hub/templates
SSH key added on Creating stage

but connection is refused
ssh -v centos@ssh -v centos@144.76.45.XXX

centos@144.76.45.XXX: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

if i use Debian template same key works with debian user
Regards