if you want to add the user that runs the playbook, irrespective of
the user used to login, try:
name={{ lookup('env', 'USER") }}
ansible_ssh_user reflects the LOGIN user set for the remote machine,
in 1.9 it always set it, which caused issues with .ssh/config, in 2.0
if not set it will be None, in which case ssh uses the 'current user'
but it ends up not being specified in Ansible.