check username and password - django code example

Example 1: django request user

def my_view(request):
    if not request.user.is_authenticated:
        return render(request, 'myapp/login_error.html')

Example 2: set password django

myuser.groups.set([group_list])
myuser.groups.add(group, group, ...)
myuser.groups.remove(group, group, ...)
myuser.groups.clear()
myuser.user_permissions.set([permission_list])
myuser.user_permissions.add(permission, permission, ...)
myuser.user_permissions.remove(permission, permission, ...)
myuser.user_permissions.clear()