<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def send_request(endpoint, **kwargs):
 """Return the response to a query as JSON from the NewsAPI web service. The basic API is limited to 100 results which is chosen unless explicitly given as an argument. Beyond that, paging is supported through the "page" argument, if needed. Parameters endpoint : str Endpoint to query, e.g. "everything" or "top-headlines" kwargs : dict A list of keyword arguments passed as parameters with the query. The basic ones are "q" which is the search query, "from" is a start date formatted as for instance 2018-06-10 and "to" is an end date with the same format. Returns ------- res_json : dict The response from the web service as a JSON dict. """

    if api_key is None:
        logger.error('NewsAPI cannot be used without an API key')
        return None
    url = '%s/%s' % (newsapi_url, endpoint)
    if 'apiKey' not in kwargs:
        kwargs['apiKey'] = api_key
    if 'pageSize' not in kwargs:
        kwargs['pageSize'] = 100
    res = requests.get(url, params=kwargs)
    res.raise_for_status()
    res_json = res.json() 
    return res_json