new_contents: import json
  import datetime
  
  from simplekv import fs
  
  
  def clean_auth_tokens():
      store = fs.FilesystemStore("./sessions")
  
      for key in store.iter_keys():
          value = json.loads(store.get(key).decode("utf-8"))
  
          is_revoked = value["revoked"] == True
          expiration = datetime.datetime.fromtimestamp(value["token"]["exp"])
          is_expired = expiration < datetime.datetime.now()
  
          if is_revoked or is_expired:
              store.delete(key)
  
subject: Add a module to store binary commands code