auth_validator.dart

class AuthValidator {
  String validatePassword(String value) {
    if (value.length < 6)
      return 'Contraseña debe ser mayor a 6 caracteres';
    else
      return null;
  }

  String validateEmail(String value) {
    const String pattern =
        r'^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$';
    final RegExp regex = RegExp(pattern);
    if (!regex.hasMatch(value))
      return 'Ingresa un email valido';
    else
      return null;
  }
}