Use Django authentication views.

biscuit/core/templates/core/base.html

@@ -34,7 +34,7 @@
  <div class="container">
   <h1>{% block page_title %}{% endblock %}</h1>
   <div class="row">
-   {% block inner_content %}{% endblock %}
+   {% block content %}{% endblock %}
   </div>
  </div>
 {% endblock %}

biscuit/core/templates/core/index.html

@@ -3,7 +3,7 @@
 
 {% block page_title %}{% blocktrans %}BiscuIT School Information System (SIS) - Next Generation Platform{% endblocktrans %}{% endblock %}
 
-{% block inner_content %}
+{% block content %}
  <div class="jumbotron">
   <p>
    {% blocktrans %}

biscuit/core/templates/registration/login.html

+{% extends "core/base.html" %}
+{% load bootstrap3 %}
+
+{% block content %}
+ {% if next %}
+  {% if user.is_authenticated %}
+   <p>
+    Your account doesn't have access to this page. To proceed,
+    please login with an account that has access.
+   </p>
+  {% else %}
+   <p>Please login to see this page.</p>
+  {% endif %}
+ {% endif %}
+
+ <form method="post" action="{% url 'login' %}">
+  {% csrf_token %}
+  {% bootstrap_form form %}
+  <input type="submit" value="Login" />
+  <input type="hidden" name="next" value="{{ next }}">
+ </form>
+{% endblock %}

biscuit/core/urls.py

@@ -7,6 +7,7 @@ from . import views
 
 urlpatterns = [
     path('admin/', admin.site.urls),
+    path('accounts/', include('django.contrib.auth.urls')),
     path('', views.index, name='index'),
 ]