User Can Connect To ShareMyHealth App

[dchukhin]

This pull request:

• removes the initial login, and lets social-auth-app-django log the user in by using the VMIOAuth2Backend
• adds a backend, ShareMyHealthOAuth2Backend, for authenticating to https://alpha.sharemy.health, very similarly to the way it authenticates to VMI, using the social-auth-app-django library
• sets up a new flow for the user:

  • homepage has a 'login' (authenticate to VMI) button
  • logging in takes user to a resources page, which lists all of the resources that the user can connect to, which is currently just 'sharemyhealth' (https://alpha.sharemy.health)
  • user can connect to or disconnect from sharemyhealth', which either stores a sharemyhealth token for the user in the database, or removes the sharemyhealth token for the user from the database. The token can be accessed by:

    user = User.objects.get(id=…)
    token = user.social_auth.filter(
    provider=getattr(settings, 'SOCIAL_AUTH_SHAREMYHEALTH_NAME')
    )[0].access_token

To test locally:

• create an account on https://alpha.sharemy.health/
• register an app on https://alpha.sharemy.health/o/applications/register/
• fill in the new settings in your local environment based on name of the service being authenticated to, the ShareMyHealth site URL, and the new app’s Client id and Client secret
• go to the (local) homepage for this project, and go through the user flow

[dchukhin]

Yes, it looks like extra_data stores an object that looks like:

{
    'auth_time': '',
    'id_token': '',
    'refresh_token': '',
    'id': '',
    'access_token': '',
    'token_type': '',
}

(with the values filled in)