Use browser when adding Google account on Android One

Checklist

• I have used the search function to see if someone else has already submitted the same feature request.
• I will describe the problem with as much detail as possible.
• This issue only contains a request for one single feature, not multiple (related) features.

App version

6.201

Problem you are trying to solve

In order to link a Gmail account to K-9 you have to login using the Google Services OS services, which in practice links up your phone to another account with the consequences it entails: Duplicate calendars, contact lists, and additional services irrelevant to the workings of my phone as I like it. On the other hand, I have secondary Gmail addresses where I receive email. As it is, you have to go through the movements, make sure K-9 works well with that account and then delete said Google account; but your device has already been registered to that account in Google, not nice.

Suggested solution

Create an option for "private login" using a Chrome Tab to retrieve the OAUTH 2.0 token. As an example: This is already implemented in Aqua Mail.

Screenshots / Drawings / Technical details

No response

No file or test is named. Start by locating the current Google account sign-in flow and its OAuth handling, then review the 15-comment discussion for the agreed approach. Done means users can add a Gmail account through a browser tab without adding that account to Android system services, with the existing account flow still working.