$co_author = Array
(
    [ID] => 215
    [user_firstname] => Hannah
    [user_lastname] => Millar
    [nickname] => hannah.millar
    [user_nicename] => hannah-millar
    [display_name] => Hannah Millar
    [user_email] => hannah.millar@accenture.com
    [user_url] => 
    [user_registered] => 2020-06-22 14:29:15
    [user_description] => 
    [user_avatar] => 
)