title: Do I need to revalidate my Bing Maps credentials?
body: <p>Do Bing Maps credentials time out? </p>
  
  <p>My Bing Maps credentials, supplied like so (but with a bogus value shown here):</p>
  
  <pre><code>&lt;maps:Map x:Name="bingMap" Grid.Column="1" Grid.Row="1" Grid.RowSpan="2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" LandmarkTapped="BingMap_OnLandmarkTapped" Credentials="jkdfsjkfadjkdfsajkdfsasdfaasdf" /&gt;
  </code></pre>
  
  <p>...have worked fine until today, and now I get this message across the map on my main page when I run my app:</p>
  
  <p>"<em>The specified credentials are invalid. You can sign up...(bla bla bla)</em>"</p>
  
  <p>So does one need to "re-sign up" for Bing Maps credentials every once in a while, or...???</p>