// show user avatar if logged in
function colaborator_avatar($atts)
{
    if (is_user_logged_in() && !is_feed()) {
        return '<div class="user-profile-image">'  . get_avatar(get_the_author_meta( 'user_email' )) . '</div>';
    }
}
add_shortcode('colaborator_avatar', 'colaborator_avatar');

// show username if logged in
function show_loggedin_function( $atts ) {

	global $current_user, $user_login;
      	get_currentuserinfo();
	add_filter('widget_text', 'do_shortcode');
	
	if ($user_login) 
		return '<div class="display-user-name">Hello, ' . $current_user->user_firstname . '</div>';
	else
		return '<a class="loging-url" href="https://barbershop.woochamp.com/my-account/">Login/Signup</a>';
	
}
add_shortcode( 'show_loggedin_firstname', 'show_loggedin_function' );