Send verification code / link for email address change

[neural-loop]

Did you star the repo?
Yes

Is your feature request related to a problem? Please describe.
When a user registers, the email is verified through the process of verification. However, if changing the email, it accepts new input.

Describe the solution you'd like
An option in the config, to send code when updating email address

[jeremykenedy]

If you make a feature to handle this I will gladly accept the PR. Thank you.