Implement Admin approval (#29)

This PR fixes #7

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#29

epdb/logic.py

@@ -4,6 +4,7 @@ from typing import Union, List, Optional, Set, Dict
 
 from django.contrib.auth import get_user_model
 from django.db import transaction
+from django.conf import settings as s
 
 from epdb.models import User, Package, UserPackagePermission, GroupPackagePermission, Permission, Group, Setting, \
     EPModel, UserSettingPermission, Rule, Pathway, Node, Edge
@@ -12,11 +13,15 @@ logger = logging.getLogger(__name__)
 
 class UserManager(object):
     @staticmethod
-    def create_user(username, email, password):
+    def create_user(username, email, password, *args, **kwargs):
         # avoid circular import :S
         from .tasks import send_registration_mail
-        # TODO flip to False
-        u = get_user_model().objects.create_user(username, email, password, is_active=True)
+
+        is_active = not s.ADMIN_APPROVAL_REQUIRED
+        if 'is_active' in kwargs:
+            is_active = kwargs['is_active']
+
+        u = get_user_model().objects.create_user(username, email, password, is_active=is_active)
 
         # Create package
         package_name = f"{u.username}{'’' if u.username[-1] in 'sxzß' else 's'} Package"