public static string GenerateInvalidUsBankAccountNonce()
{
var valid_characters = "bcdfghjkmnpqrstvwxyz23456789";
var token = "tokenusbankacct";
Random rnd = new Random();
for(int i=0; i<4; i++) {
token += "_";
for(int j=0; j<6; j++) {
token += valid_characters[rnd.Next(0,valid_characters.ToCharArray().Length)];
}
}
return token + "_xxx";
}