text: from django.shortcuts import render
  from django.contrib.auth.models import User
  from django.http import JsonResponse
  
  
  def profile(request):
      return render(request, "profile.html")
  
  
  def validate_username(request):
      username = request.GET.get('username', None)
      data = {
          'is_present': User.objects.filter(username__iexact=username).exists()
      }
      return JsonResponse(data)
  