$co_author = Array
(
    [ID] => 93
    [user_firstname] => Tyaga
    [user_lastname] => Iyer
    [nickname] => tyaga.iyer
    [user_nicename] => tyaga-iyer
    [display_name] => Tyaga Iyer
    [user_email] => tyaga.iyer@accenture.com
    [user_url] => 
    [user_registered] => 2018-12-05 00:17:25
    [user_description] => 
    [user_avatar] => 
)