def getUserPassword(host='www.cadc-ccda.hia-iha.nrc-cnrc.gc.ca'):
    """"Getting the username/password for host from .netrc filie """
    if os.access(os.path.join(os.environ.get('HOME','/'),".netrc"),os.R_OK):
        auth=netrc.netrc().authenticators(host)
    else:
        auth=False
    if not auth:
        sys.stdout.write("CADC Username: ")
        username=sys.stdin.readline().strip('\n')
        password=getpass.getpass().strip('\n')
    else:
        username=auth[0]
        password=auth[2]
    return (username,password)