No require password if register via social auth

judge/authentication.py

@@ -1,5 +1,8 @@
 from django.contrib.auth.backends import ModelBackend
 from django.contrib.auth.models import User
+from django.contrib.auth.forms import PasswordChangeForm
+from django.contrib.auth.views import PasswordChangeView
+from django.urls import reverse_lazy
 
 
 class CustomModelBackend(ModelBackend):
@@ -13,3 +16,32 @@ class CustomModelBackend(ModelBackend):
 
         if user and user.check_password(password):
             return user
+
+
+class CustomPasswordChangeForm(PasswordChangeForm):
+    def __init__(self, *args, **kwargs):
+        super(CustomPasswordChangeForm, self).__init__(*args, **kwargs)
+        if not self.user.has_usable_password():
+            self.fields.pop("old_password")
+
+    def clean_old_password(self):
+        if "old_password" not in self.cleaned_data:
+            return
+        return super(CustomPasswordChangeForm, self).clean_old_password()
+
+    def clean(self):
+        cleaned_data = super(CustomPasswordChangeForm, self).clean()
+        if "old_password" not in self.cleaned_data and not self.errors:
+            cleaned_data["old_password"] = ""
+        return cleaned_data
+
+
+class CustomPasswordChangeView(PasswordChangeView):
+    form_class = CustomPasswordChangeForm
+    success_url = reverse_lazy("password_change_done")
+    template_name = "registration/password_change_form.html"
+
+    def get_form_kwargs(self):
+        kwargs = super(CustomPasswordChangeView, self).get_form_kwargs()
+        kwargs["user"] = self.request.user
+        return kwargs