id; } public function setId(?int $id) : self { $this->id = $id; return $this; } public function getUsername() : ?string { return $this->username; } public function setUsername(?string $username) : self { $this->username = $username; return $this; } public function getEmail() : ?string { return $this->email; } public function setEmail(?string $email) : self { $this->email = $email; return $this; } }