- width ||= 320
.facepile
  %iframe{src: "https://www.facebook.com/plugins/facepile.php?app_id=#{StarterKit::AuthConfig.providers.facebook.key}&width=#{width}&max_rows=4&size=medium",
    scrolling: 'no',
    frameborder: '0',
    style: "border:none; overflow:hidden; width:#{width}px; height: 90px",
    allowTransparency: 'true'}

- width ||= 420
.facepile
  %iframe{src: "https://www.facebook.com/plugins/facepile.php?app_id=#{StarterKit::AuthConfig.providers.facebook.key}&width=#{width}&max_rows=4&size=medium",
    scrolling: 'no',
    frameborder: '0',
    style: "border:none; overflow:hidden; width:#{width}px; height: 90px",
    allowTransparency: 'true'}

Set facepile default width to auth form width
Set facepile default width to auth form width