Step 1 : Login to your Google account https://myaccount.google.com/

Step 2 : Click on Security Menu

Step 3 : To generate app password its required to Enable 2-Step Verification so please enable it if its off

Step 4 : After enabling 2-Step Verification, In Search box search “App Password” then from search result select App Password
(It might ask you to re-login)
– It will not show App password option if 2-step verification is off

Step 5 : Enter “Go GST Bill” in App name and click on create button

Step 6 : Copy your app password

Step 6 : Enter your gmail address & password copied from last step and click on save button.