Email changes are not replicated to sendgrid

[vyper]

Problem

Email changes are not replicated to sendgrid.

Steps to reproduce:

1. sign in using github (with email 1, example: [email protected]) - here system sent data to sendgrid, because user is not persisted;
2. change your email in github;
3. sign in using github (with email 2, example: [email protected]) - here system not sent data to sendgrid, because user is persisted and email in sendgrid was wrong.

Possible solution

1. integrate with sendgrid for new users and for email changes
2. remove old email from sendgrid
3. add new email on sendgrid