Sample angular 5 model declaration

user-profile-assign.model.ts

export class UserProfile {
  id;
  firstName;
  lastName;
  userName;
  email;
  gender;
  phone;
  birthDate;
  image;
  totpKey;
  thumbs;
  constructor({...userObj}) {
    Object.assign(this, { ...userObj }); 
  }
}

user-profile.model.ts

export class UserProfile {
  id;
  firstName;
  lastName;
  userName;
  email;
  gender;
  phone;
  birthDate;
  constructor({...userObj}) {
    
    this.id = userObj.id ;
    this.firstName = userObj.firstName || '';
    this.lastName = userObj.lastName || '';
    this.userName = userObj.userName;
    this.email = userObj.email;
    this.gender = userObj.gender; 
    this.phone = userObj.phone;
    this.birthDate = userObj.birthdate;
  }
}