Python3, Certificate generation

Done changes suggested by Kim:
1) added python3 to manage.py
2) User account activation link works multiple times without showing error(link even works when the account is activated)
3) Do not alter fields in Certificate generation are disabled for editing(using editable=False). So, that no one can alter them. These fields are system generated.

Author: Rishabh04-02

manage.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os
 import sys
 
@@ -9,7 +9,7 @@
     except ImportError:
         # The above import may fail for some other reason. Ensure that the
         # issue is really that Django is missing to avoid masking other
-        # exceptions on Python 2.
+        # exceptions on Python 3.
         try:
             import django
         except ImportError:

vpn/models.py

@@ -206,16 +206,19 @@ class GenerateCertificate(models.Model):
         max_length=15,
         default='',
         blank=True,
+        editable=False,
         help_text="<b><a>System Generated - Do not alter</a></b>")
     cert_password = models.CharField(
         max_length=20,
         default='',
         blank=True,
+        editable=False,
         help_text="<b><a>System Generated - Do not alter</a></b>")
     key_name = models.CharField(
         max_length=15,
         default='',
         blank=True,
+        editable=False,
         help_text="<b><a>System Generated - Do not alter</a></b>")
 
     def __unicode__(self):

vpn/views.py

@@ -56,9 +56,8 @@ def activate(request, uidb64, token):
 
     if user is not None and account_activation_token.check_token(user, token):
         user.is_active = True
-        # Creating entry to profile.email_verified, as to fetch and display it to the admin.
-        UserProfile.objects.create(username_id=uid, email_verified=True)
-        user.save()
+        # Creating/Updating entry to profile.email_verified, as to fetch and display it to the admin. Updating it as when user visits the same link more than once then it gives an error, so as to remove that error just added Update option along with Insert values.
+        UserProfile.objects.filter(username_id=uid).update(email_verified=True)
         return HttpResponse(
             '<center>Thank you for your email confirmation. Now you can login your account.</center>'
         )