Check if nictags exists

    nictag : string
        one or more nictags to check
    verbose : boolean
        return list of nictags

    CLI Example:

    .. code-block:: bash

        salt '*' nictagadm.exists admin

def exists(*nictag, **kwargs):
    '''
    Check if nictags exists

    nictag : string
        one or more nictags to check
    verbose : boolean
        return list of nictags

    CLI Example:

    .. code-block:: bash

        salt '*' nictagadm.exists admin
    '''
    ret = {}
    if not nictag:
        return {'Error': 'Please provide at least one nictag to check.'}

    cmd = 'nictagadm exists -l {0}'.format(' '.join(nictag))
    res = __salt__['cmd.run_all'](cmd)

    if not kwargs.get('verbose', False):
        ret = res['retcode'] == 0
    else:
        missing = res['stderr'].splitlines()
        for nt in nictag:
            ret[nt] = nt not in missing

    return ret