Update django_mongodb_backend/schema.py

Co-authored-by: Jib <Jibzade@gmail.com>

Author: aclark4life

django_mongodb_backend/schema.py

@@ -436,8 +436,7 @@ def _create_collection(self, model):
             client = self.connection.connection
             options = getattr(client._options, "auto_encryption_opts", None)
             if options is not None:
-                schema_map = getattr(options, "_schema_map", None)
-                if schema_map:
+                if schema_map := getattr(options, "_schema_map", None)
                     db.create_collection(db_table, encryptedFields=schema_map[db_table])
                 else:
                     key_vault_namespace = options._key_vault_namespace