Answers for "how to check login in django"

how to require login for Django function views

To require login for Django function-based views
  
from django.contrib.auth.decorators import login_required

@login_required
def your_view():
    .....
        
      To require login for Django class-based views
      
from django.contrib.auth.mixins import LoginRequiredMixin

class MyView(LoginRequiredMixin, View):
	.....

django login

from django.contrib.auth import authenticate, login

def my_view(request):
    username = request.POST['username']
    password = request.POST['password']
    user = authenticate(request, username=username, password=password)
    if user is not None:
        login(request, user)
        # Redirect to a success page.
        ...
    else:
        # Return an 'invalid login' error message.
        ...