Log in to the mobile app with your regular AutoEntry account details (email and password). This is only required after a fresh install, or if you have manually logged out of the app.
Please note that you must first have an existing AutoEntry account, with permission to upload to Purchases, Sales or Expense Reports of at least one company.
Learn about adding users and Permissions
If you signed up to AutoEntry using your Intuit Quickbooks ID, please see here to create an AutoEntry password and log into the phone app.