BuddyPress.org

Hello,

I am trying to create 2 functionalities and i would like to ask for your help please.

1. Trying to get all users with WP_User_Query that have not been active for last 60 days

// Get the contributors and administrators who haven't logged in for 60 days
    $args = array( 
    'role__in' => array( 'contributor', 'administrator' ),
	'meta_key'     => 'last_activity', // this is a meta_key storing the last time the user was logged in by buddypress in 'Y-m-d H:i:s' format
	'meta_query' => array( 
        array(
            'key' => 'last_activity',
            'value' => date('Y-m-d H:i:s', strtotime( "-60 days" )), // what am i doing wrong? 
            'compare' => '<',
            'type' => 'DATE' // Let WordPress know we're working with date
            )
        )
    );

    $remind_users = new WP_User_Query( $args ); 

-What am i doing wrong on the comparison?

2. Send en email notification to specific users when there is a sidewide notice on our website.

function important_notification() {
    
    $notification = '' . bp_get_message_notice_text( $notice->message ) . '';

    $args = array(
    'meta_key'     => '_is_featured'
    );
    

    $members = get_users( $args );
    foreach( $members as $member ) {
    $user_id = $member->ID;
    $member_account = bp_core_get_user_domain( $user_id );
    
    $first_name = $member->first_name;

    $email_subject = 'Important information';

    $message = sprintf( 'Hello %1$s,' , $first_name ) . "<br><br>"; 
   
    $message .= sprintf( 'We have an important information for you:' ) ."<br><br>"; 
    $message .= sprintf( '<i>%1$s</i>' , $notification ) ."<br><br>";
    $message .= sprintf( 'Please login <a href="%1$s" target="_blank">to your account</a> to remove the information if you want.' , $member_account ) ."<br><br>";
    

    
    wp_mail( $member->user_email, $email_subject, $message );
    }
}
add_action(  'xxxxxxxx',  'important_notification');

-Will the $notification = '' . bp_get_message_notice_text( $notice->message ) . ''; get the message text of the sidewide notice?
-In which action could i hook this function in order to send an email when admin will publish a sidewide notification?
add_action( ‘xxxxxxxx’, ‘important_notification’);

Thank you very much for your time.