docs: def login(request, signature):
      """
      Automatically logs in a user based on a signed PK of a user object. The
      signature should be generated with the `login` management command.
  
      The signature will only work for 60 seconds.
      """
      signer = TimestampSigner()
      try:
          pk = signer.unsign(signature, max_age=MAX_AGE_OF_SIGNATURE_IN_SECONDS)
      except (BadSignature, SignatureExpired) as e:
          return HttpResponseForbidden("Can't log you in")
  
      user = get_object_or_404(get_user_model(), pk=pk)
      # we *have* to set the backend for this user, so we just use the first one
      user.backend = settings.AUTHENTICATION_BACKENDS[0]
      django_login(request, user)
  
      return HttpResponseRedirect(settings.LOGIN_REDIRECT_URL)