def confirm_user(request):
if request.method == 'POST':
    password = request.POST.get('check_pass', '')
    user = auth.authenticate(password=password)
    if user is not None:
        print("Есть совпадение")
    else:
        print("Нет совпадений")
return render(request, 'check.html')

from django.contrib.auth import get_user_model
from .models import EmailCodeModel

def confirm_user(request):
if request.method == 'POST':
    code_instance = EmailCodeModel.objects.filter(email_check_code=request.GET.get('email_check_code')).first()
    if code_instance:
        code_instance.user.is_active = True
        code_instance.user.save()
        code_instance.delete()
        print('Всё хорошо')
        # тут можно сделать, например, redirect на страницу успеха
return render(request, 'check.html')