code: def set_user(self, data) -> None:
      if "theme" in data:
          self.theme = data["theme"]
          self.save()
  
imports: import time
  from labml_db import Model, Key, Index
  from typing import List, Dict, Optional, Set, Any
  from .None import project
  from ..None import utils
  from ..utils import gen_token
label_desc: Use image node_id 5 for calling the User obj's underlying member method code with example usage: obj.set_user(data) without return types