How to use the jovian.utils.error.ApiError function in jovian

def post_slack_message(data, safe=False):
    """Push data to Slack, if slack is integrated with jovian account"""
    url = _u('/slack/notify')
    res = post(url, json=data, headers=_h())
    if res.status_code == 200:
        return res.json()
    elif safe:
        return {'data': {'messageSent': False}}
    else:
        raise ApiError('Slack trigger failed: ' + pretty(res))

def upload_file(gist_slug, file, folder=None, version=None, artifact=False, version_title=None):
    """Upload an additional file to a gist"""
    data = {'artifact': 'true'} if artifact else {}
    if folder:
        data['folder'] = folder
    if version_title:
        data['version_title'] = version_title

    res = post(url=_u('/gist/' + gist_slug + '/upload' + _v(version)),
               files={'files': file}, data=data, headers=_h())
    if res.status_code == 200:
        return res.json()['data']
    raise ApiError('File upload failed: ' + pretty(res))

def post_blocks(blocks, version=None):
    url = _u('/data/record' + _v(version))
    res = post(url, json=blocks, headers=_h())
    if res.status_code == 200:
        return res.json()['data']
    else:
        raise ApiError('Data logging failed: ' + pretty(res))

def post_records(gist_slug, tracking_slugs, version=None):
    """Associated tracked records with a commit"""
    url = _u('/data/' + gist_slug + '/commit' + _v(version))
    res = post(url, json=tracking_slugs, headers=_h())
    if res.status_code == 200:
        return res.json()['data']
    else:
        raise ApiError('Data logging failed: ' + pretty(res))

def add_slack():
    """prints instructions for connecting Slack, if Slack connection is not already present.
    if Slack is already connected, prints details about the workspace and the channel"""
    url = _u('/slack/integration_details')
    res = get(url, headers=_h())
    if res.status_code == 200:
        res = res.json()
        if not res.get('errors'):
            slack_account = res.get('data').get('slackAccount')
            log('Slack already connected. \nWorkspace: {}\nConnected Channel: {}'
                .format(slack_account.get('workspace'), slack_account.get('channel')))
        else:
            log(str(res.get('errors')[0].get('message')))
    else:
        raise ApiError('Slack trigger failed: ' + pretty(res))

def get_api_key():
    """Retrieve and validate the API Key (from memory, config or user input)"""
    creds = read_creds()
    if API_TOKEN_KEY not in creds:
        key, _ = read_or_request_api_key()
        if not validate_api_key(key):
            log('The current API key is invalid or expired.', error=True)
            key, _ = request_api_key(), 'request'
            if not validate_api_key(key):
                raise ApiError('The API key provided is invalid or expired.')
        write_api_key(key)
        return key
    return creds[API_TOKEN_KEY]