I created a hash key called sessionID and got:
ValidationException: One or more parameter values were invalid: Missing the key sessionID in the item
Found out my table had to use the hash id to work properly with this module.
Maybe add the option to choose your own hash key? Or explicitly note it within the Readme/wiki?
Thanks for your help. I will try to fix this soon, by adding an optional hashKey param
Update documentation for issue #14