Pick a user password of at least 8 characters - though it is good practice to use longer ones (i.e. a passphrase) and/or use various kind of characters (uppercase, lowercase, digits and special characters).
Elixe un contrasinal con 8 caracteres como mínimo - é recomendable que sexa longo (ex. unha frase) e utilizar varios tipos de caracteres (maiúsculas, minúsculas, díxitos e caracteres especiais).