NF != 7 {
	printf("line %d, does not have 7 fields: %s\n",NR,$0) }
$1 ~ /[^A-Za-z0-9]/ {
	printf("line %d, nonalphanumeric user id: %s\n",NR,$0) }
$2 == "" {
	printf("line %d, no password: %s\n",NR,$0) }
