public function signIn(): bool
    {
        $username = filter_var($this->username, FILTER_SANITIZE_STRING);
        $password = filter_var($this->password, FILTER_SANITIZE_STRING);
        try {
            $client = $this->client->getByUsername($username);
			if (password_verify($password, $client->getPassword())) {
            	$this->setClientSession($client);
            	return true;
       		 }
        } catch (ClientNotFoundException $clientNotFoundException) {

        }
         return false;
    }