validateuser method

String? validateuser(
  1. String value
)

Implementation

String? validateuser(String value) {


  if (value.isEmpty) return "Please enter your username";
  if (value.length <= 6) {
    return "Username must be more than 8 characters!";
  }
  // Pattern pattern =
  //     r'^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[!@#\$&*~]).{6,}$';
  // RegExp regex =   RegExp(pattern);
  // if (!regex.hasMatch(value.trim())) {
  //   return "include one capital letter, number and symbol";
  // }
  return null;
}