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venv/lib/python3.9/site-packages/graphene/validation/disable_introspection.py

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+from graphql import GraphQLError
+from graphql.language import FieldNode
+from graphql.validation import ValidationRule
+
+from ..utils.is_introspection_key import is_introspection_key
+
+
+class DisableIntrospection(ValidationRule):
+    def enter_field(self, node: FieldNode, *_args):
+        field_name = node.name.value
+        if is_introspection_key(field_name):
+            self.report_error(
+                GraphQLError(
+                    f"Cannot query '{field_name}': introspection is disabled.", node
+                )
+            )