user

package com.knoldus.user;

import com.knoldus.user.annotation.Password;
import lombok.Builder;
import lombok.Value;

import javax.validation.constraints.Pattern;

@Value
@Builder
public class User {
    @Pattern(regexp ="^[a-zA-z]+$", message = "should be alpha numeric")
    String username;
    
    @Password
    String password;
}