Get a specific dashboard.

def _get(url, profile):
    '''Get a specific dashboard.'''
    request_url = "{0}/api/dashboards/{1}".format(profile.get('grafana_url'),
                                                  url)
    response = requests.get(
        request_url,
        headers={
            "Accept": "application/json",
            "Authorization": "Bearer {0}".format(profile.get('grafana_token'))
        },
        timeout=profile.get('grafana_timeout', 3),
    )
    data = response.json()
    if data.get('message') == 'Not found':
        return None
    if 'dashboard' not in data:
        return None
    return data['dashboard']