A simple snippet to authenticate user with API Token

auth.py

# this will be a view accessed /apiauthview/?token=yourapitoken?redirect_url=/my_redirect_url/
# You need django rest API extended users enabled for this
# For higher security, these tokens should be renewed each time a new request is made

from rest_framework.authentication import TokenAuthentication

# Authenticate a user with API Token
class APITokenAutoLogin(View):
    def auth(self, request, *args, **kwargs):
        # GET
        token = request.GET.get('token', None)
        # Allow a custom redirect_url
        redirect_url = request.GET.get('redirect_url', "/my_default_view/")

        # Check for API Token
        token_auth = TokenAuthentication()
        data = token_auth.authenticate_credentials(token)

        # Redirect to Login Page
        if data is None:
            return HttpResponseRedirect('/accounts/login/')

        # Login the user
        if data[0] is not None and data[1] is not None:
            # User info
            user = data[0]

            # Set Auth Backend - required in Django 1.8
            user.backend = 'allauth.account.auth_backends.AuthenticationBackend'

            # Django Login as a user
            login(request, user)

            return HttpResponseRedirect(redirect_url, *args, **kwargs)

    def get(self, request, *args, **kwargs):
        return self.auth(request, *args, **kwargs)