code: def clear_cookie(self, name: str, path: str = "/", domain: str = None) -> None:
          
          expires = datetime.datetime.utcnow() - datetime.timedelta(days=365)
          self.set_cookie(name, value="", path=path, expires=expires, domain=domain)
docs: Deletes the cookie with the given name.
  
          Due to limitations of the cookie protocol, you must pass the same
          path and domain to clear a cookie as were used when that cookie
          was set (but there is no way to find out on the server side
          which values were used for a given cookie).
  
          Similar to `set_cookie`, the effect of this method will not be
          seen until the following request.