title: How to Append a Text File in an Azure Blob with a Azure Function
body: <p>I've got a text file I need to append data to daily with a timer Azure Function.  The text file is a comma separated file.
  I've created my CloudBlobClient and knew how to make my Shared Access Policy and Token.
  I just don't know how to use this to upload.  I only know how to get an access URI from the tutorial I'm working with.</p>