Snippet code to check if user logged in

   if ($modx->user->hasSessionContext($modx->context->get('key')) )

<?php
$output = '';
$albumData = unserialize(file_get_contents("http://vimeo.com/api/v2/album/$albumID/videos.php"));

$output .= '<div id="albumGallery">
';
foreach ($albumData as $vid) {
   $output .= '   <div id="albumGalleryItem">';
   $output .= '<a href="'.$vid['url'].'" title="'.$vid['title'].'" rel="zoombox[group]">';
   $output .= '<div class="ImgContainer"><img src="'.$vid['thumbnail_medium'].'"></div>';
   $output .= '<div id="albumGalleryCaption">'.$vid['title'].'</div>';
   $output .= '<div id="albumGalleryDescription">'.$vid['description'].'</div>';
   $output .= '</a>';
   if ($modx->user->hasSessionContext($modx->context->get('key')) ) {
      $output .=  '<a class="button" href="'.$vid['url'].'/settings/thumbnails">Change Settings</a>';
   }
   $output .= '</div>
';
}
$output .= '</div>';

return $output;​