Meet bot bug after e-mail change.

When I set up my Keybase user I used e-mail address `A`, later I then changed my e-mail to `B`. First this meant that the Meet bot would use address `A` to set up meetings. Now since I have deleted `A` and only kept `B` as my primary e-mail address the meet bot won't respond to my prompts/commands in any situation.

The report names no files, tests, or entry points. Reproduce the Meet bot failure after changing the primary email from A to B, then locate the relevant bot handling entry point; done means the bot responds to commands using the retained primary address.

Written by the indexing model from the issue text.