title: invalid link in reset_password
body: <p>I wanna to write a custom user in Django but I have a problem with the reset password. I use the URLs below for urls.py</p>
  
  <pre><code>url(r'^reset_password_confirm/(?P&lt;uidb64&gt;[0-9A-Za-z_\-\']+)-(?P&lt;token&gt;[0-9A-Za-z\-\']+)/$', PasswordResetConfirmView.as_view() , name='reset_password_confirm'),
  url(r'^reset_password', ResetPasswordRequestView.as_view())
  </code></pre>
  
  <p>and this is my view for reset password and confirm it</p>
  
  <pre><code>class ResetPasswordRequestView(FormView):
          # User = get_user_model()
          template_name = "test_template.html"    #code for template is given below the view's code
          success_url = 'reset_password'
          form_class = PasswordResetRequestForm
  
          @staticmethod
          def validate_email_address(email):
              try:
                  validate_email(email)
                  return True
              except ValidationError:
                  return False
  
          def post(self, request, *args, **kwargs):
              form = self.form_class(request.POST)
              if form.is_valid():
                  data= form.cleaned_data["email_or_username"]
              if self.validate_email_address(data) is True:                 #uses the method written above
                  '''
                  If the input is an valid email address, then the following code will lookup for users associated with that email address. If found then an email will be sent to the address, else an error message will be printed on the screen.
                  '''
                  associated_users= User.objects.filter(Q(email=data)|Q(username=data))
                  if associated_users.exists():
                      for user in associated_users:
                              c = {
                                  'email': user.email,
                                  'domain': request.META['HTTP_HOST'],
                                  'site_name': 'your site',
                                  'uid': urlsafe_base64_encode(force_bytes(user.pk)),
                                  'user': user,
                                  'token': default_token_generator.make_token(user),
                                  'protocol': 'http',
                                      }
                              subject_template_name='password_reset_subject.txt' 
                              # copied from django/contrib/admin/templates/registration/password_reset_subject.txt to templates directory
                              email_template_name='password_reset_email.html'    
                              # copied from django/contrib/admin/templates/registration/password_reset_email.html to templates directory
                              subject = loader.render_to_string(subject_template_name, c)
                              # Email subject *must not* contain newlines
                              subject = ''.join(subject.splitlines())
                              email = loader.render_to_string(email_template_name, c)
                              send_mail(subject, email, DEFAULT_FROM_EMAIL , [user.email], fail_silently=False)
                      result = self.form_valid(form)
                      messages.success(request, 'An email has been sent to ' + data +". Please check its inbox to continue reseting password.")
                      return result
                  result = self.form_invalid(form)
                  messages.error(request, 'No user is associated with this email address')
                  return result
              else:
                  '''
                  If the input is an username, then the following code will lookup for users associated with that user. If found then an email will be sent to the user's address, else an error message will be printed on the screen.
                  '''
                  associated_users= User.objects.filter(username=data)
                  if associated_users.exists():
                      for user in associated_users:
                          c = {
                              'email': user.email,
                              'domain': 'example.com', #or your domain
                              'site_name': 'example',
                              'uid': urlsafe_base64_encode(force_bytes(user.pk)),
                              'user': user,
                              'token': default_token_generator.make_token(user),
                              'protocol': 'http',
                              }
                          subject_template_name='password_reset_subject.txt'
                          email_template_name='password_reset_email.html'
                          subject = loader.render_to_string(subject_template_name, c)
                          # Email subject *must not* contain newlines
                          subject = ''.join(subject.splitlines())
                          email = loader.render_to_string(email_template_name, c)
                          send_mail(subject, email, DEFAULT_FROM_EMAIL , [user.email], fail_silently=False)
                      result = self.form_valid(form)
                      messages.success(request, 'Email has been sent to ' + data +"'s email address. Please check its inbox to continue reseting password.")
                      return result
                  result = self.form_invalid(form)
                  messages.error(request, 'This username does not exist in the system.')
                  return result
              messages.error(request, 'Invalid Input')
              return self.form_invalid(form)  
  
  class PasswordResetConfirmView(FormView):
      template_name = "password_reset_confirm.html"
      success_url = 'admin'
      form_class = SetPasswordForm
  
      def post(self, request, uidb64=None, token=None, *arg, **kwargs):
          """
          View that checks the hash in a password reset link and presents a
          form for entering a new password.
          """
          UserModel = get_user_model()
          form = self.form_class(request.POST)
          assert uidb64 is not None and token is not None  # checked by URLconf
          try:
              uid = urlsafe_base64_decode(uidb64)
              user = UserModel._default_manager.get(pk=uid)
          except (TypeError, ValueError, OverflowError, UserModel.DoesNotExist):
              user = None
  
          if user is not None and default_token_generator.check_token(user, token):
              if form.is_valid():
                  new_password= form.cleaned_data['new_password2']
                  user.set_password(new_password)
                  user.save()
                  messages.success(request, 'Password has been reset.')
                  return self.form_valid(form)
              else:
                  messages.error(request, 'Password reset has not been unsuccessful.')
                  return self.form_invalid(form)
          else:
              messages.error(request,'The reset password link is no longer valid.')
              return self.form_invalid(form) 
  </code></pre>
  
  <p>it sends an email include an invalid link such <code>HTTP://127.0.0.1:8000/reset_password_confirm/b'MjM'-4y1-68809e63d52242805bd7/</code></p>
  
  <p>when I clicked on it so I receive this message that shows it is an invalid
  <code>The password reset link was invalid, possibly because it has already been used. Please request a new password reset</code>.</p>
  
  <p>I searched a lot and didn't any solution. can anybody help me, please?
  thanks a lot</p>