class User:
    def __init__(self,username,email,password):
        self._username = username
        self._email = email
        self._password = password
        
    @property
    def username(self):
        return self._username

    @username.setter
    def username(self,username):
        self._username = username

    @property
    def email(self):
        return self._email

    @email.setter
    def email(self, mail):
        self._email = mail

    @property
    def password(self):
        return self._password

    @password.setter
    def password(self,password):
        self._password = password  


