Implement forgot password functionality

[rosiejeays]

Technically password can be updated using the PUT user api, however this requires the user to already be logged in.
I also wouldn't mind a second factor of authentication such as that which a forgot password email function provides.

I've already added user email as a required field to prepare for this change.
This may require a bit of tinkering in the back end to do this the way I want to do it

• https://github.com/rosiemaguire/Django-crowd-funding-project

[rosiejeays]

• https://studygyaan.com/django/django-rest-framework-tutorial-change-password-and-reset-password