how can i use filter to check if specific user's social media link is correct?

Question

def userProfile(request, pk):

    user = User.objects.get(id=pk)
    rooms = user.room_set.all()
    room_messages = user.message_set.all()
    topics = Topic.objects.all()

    link_fb = User.objects.filter(Q(link_fb__icontains='facebook'))
    link_ig = User.objects.filter(Q(link_ig__icontains='instagram'))
    link_lin = User.objects.filter(Q(link_lin__icontains='linkedin'))

    context = {'user': user, 'rooms': rooms, 'room_messages': room_messages,
               'topics': topics, 'link_fb': link_fb, 'link_ig': link_ig,
               'link_lin': link_lin}
    return render(request, 'base/profile.html', context)

I've got something like this. I want to check if url is correct. Problem is i can not get specific user and then use filter. Is there any other way to do that?