$co_author = Array
(
    [ID] => 180
    [user_firstname] => San
    [user_lastname] => Retna
    [nickname] => s.retna
    [user_nicename] => s-retna
    [display_name] => San Retna
    [user_email] => s.retna@accenture.com
    [user_url] => 
    [user_registered] => 2020-02-16 19:05:07
    [user_description] => 
    [user_avatar] => 
)

 $co_author = Array
(
    [ID] => 180
    [user_firstname] => San
    [user_lastname] => Retna
    [nickname] => s.retna
    [user_nicename] => s-retna
    [display_name] => San Retna
    [user_email] => s.retna@accenture.com
    [user_url] => 
    [user_registered] => 2020-02-16 19:05:07
    [user_description] => 
    [user_avatar] => 
)

 $co_author = Array
(
    [ID] => 180
    [user_firstname] => San
    [user_lastname] => Retna
    [nickname] => s.retna
    [user_nicename] => s-retna
    [display_name] => San Retna
    [user_email] => s.retna@accenture.com
    [user_url] => 
    [user_registered] => 2020-02-16 19:05:07
    [user_description] => 
    [user_avatar] => 
)