i am facing issue when i register new employee "Illuminate\Database\Grammar::parameterize(): Argument #1 ($values) must be of type array, string given, called in F:\loyaloid-main\vendor\laravel\framework\src\Illuminate\Database\Query\Grammars\Grammar.php on line 1047" here is my code

    $password = Str::random(8);

    $hashedPassword = Hash::make($password);

    // dd($this->_request->all());

     if($this->_request->has('save_button')){



        // dd($this->_request->all());

        $user= User::create([

            'username' => $this->_request->input('username'),

            'email' => $this->_request->input('email'),

            'password' => $hashedPassword

        ]);