Validate the password by checking the length

Example config (min 5 characters, max 9 characters):

[
  length: [
    min: 5,
    max: 9,
  ]
]copy

Examples

iex> LengthValidator.validate("simple2", [length: [min: 3]])
:ok

iex> LengthValidator.validate("too_short", [length: [min: 10]])
{:error, [{"String is too short. Only 9 characters instead of 10",
validator: PasswordValidator.Validators.LengthValidator, error_type: :too_short}]}

iex> LengthValidator.validate("too_long", [length: [min: 3, max: 6]])
{:error, [{"String is too long. 8 but maximum is 6",
validator: PasswordValidator.Validators.LengthValidator, error_type: :too_long}]}copy