src/modules/user/user.entity.ts

export class User {
  constructor(
    public readonly id: number,
    public email: string,
    public profilePictureUrl?: string | null
  ) {}

  updateEmail(newEmail: string) {
    this.email = newEmail;
  }

  updateProfilePicture(url: string) {
    this.profilePictureUrl = url;
  }
}