When you click "Generate Report" from the main page you are prompted to login into your Google Account and authorize the Reportifier App for Read-Only access to your Google Analytics data.
Naturally the Reportifier App needs access to the data to produce the Report. We don't access the data for anything else, apart from generating the requested Reports for you.
If you wish to remove access of the Reportifier App to your Google Analytics data, login to your Google Account and navigate to the following URL:
Remove the access to your Google Analytics data for Reportifier

Made by Georgi Lubomirov (2017)