title: facebook cognito android example not working
body: <p>I have implemented facebook android cognito example cognitosyncdemo as per the instructions, i am getting following error, when trying sync the dataset,</p>
  
  <p>E/ListDatasetsActivity(8541): Caused by: com.amazonaws.AmazonServiceException: 1 validation error detected: Value '{graph.facebook.com=}' at 'logins' failed to satisfy constraint: Map value must satisfy constraint: Member must have length less than or equal to 2048, Member must have length greater than or equal to 1, Member must satisfy regular expression pattern: [\S]+</p>
  
  <p>Note: The code is exactly as per the example cognitodemosync.  from github</p>
  
  <p><a href="https://github.com/awslabs/aws-sdk-android-samples/tree/master/CognitoSyncDemo" rel="nofollow noreferrer">https://github.com/awslabs/aws-sdk-android-samples/tree/master/CognitoSyncDemo</a></p>