login with email added

[ihsaan-ullah]

@ mention of reviewers

@Didayolo @bbearce @dtuantran

A brief description of the purpose of the changes contained in this PR.

Now user can use either username or email to login

Checklist

• Code review by me
• Hand tested by me
• I'm proud of my work
• Code review by reviewer
• Hand tested by reviewer
• CircleCi tests are passing
• Ready to merge

[Didayolo]

@bbearce Could you please review this PR?

[Didayolo]

@ihsaan-ullah @bbearce I've tested it locally and it works like a charm.

[bbearce]

Checking the 6 new files to see if the design fits normal django design patterns.

Sources for patterns:

• https://djangocentral.com/authentication-using-an-email-address/
• https://rahmanfadhil.com/django-login-with-email/
• https://stackoverflow.com/questions/37332190/django-login-with-email
• https://medium.com/analytics-vidhya/django-custom-authentication-with-email-cc7e3919f11c

1. src/apps/profiles/backends.py - Ihsaan makes an email authentication backend class like all examples show.
2. src/apps/profiles/forms.py - We need a custom form inherited from Django's built in forms. We were using a default one but now we need to edit that a bit. This seems on point with the tutorials.
   • Question for the team: Do we need any validation? I thought so for username but only previously correct usernames are allowed during sign up so we don't need to check them for log in as only a correct one would theoretically work.
3. src/apps/profiles/urls_accounts.py - turn login view from default to an actual one.
4. src/apps/profiles/views.py - Looks good but I couldn't log in with username anymore. I mad a new commit that allows either.
5. src/settings/base.py - As per notes, profiles.backends.EmailAuthenticationBackend needs to be added to AUTHENTICATION_BACKENDS
6. src/templates/registration/login.html - simple update letting user know they can use either username or email.