code: def verify_jwt_in_request_optional():
      
      try:
          if request.method not in config.exempt_methods:
              jwt_data = _decode_jwt_from_request(request_type='access')
              ctx_stack.top.jwt = jwt_data
              verify_token_claims(jwt_data)
              _load_user(jwt_data[config.identity_claim_key])
      except (NoAuthorizationError, InvalidHeaderError):
          pass
docs: Optionally check if this request has a valid access token.  If an access
      token in present in the request, :func:`~flask_jwt_extended.get_jwt_identity`
      will return  the identity of the access token. If no access token is
      present in the request, this simply returns, and
      :func:`~flask_jwt_extended.get_jwt_identity` will return `None` instead.
  
      If there is an invalid access token in the request (expired, tampered with,
      etc), this will still raise the appropiate exception.