Feature | Implement password validator

[morenol]

Right now we allow any password in user creation.

hilow/src/domain/services/user.rs

Line 66 in c6655c0

fn validate_password(_: &str) -> bool {

We must implement a more safer validation for the password.

We can use a regex or use a configuration to define the number of lowercase letters, uppercase letters, numbers and punctuation symbols that the password must have.