laravel报错Class 'database\Migrations\类名' not found

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问题：
laravel项目里，我需要实现自己管理创建表的功能，我试着调用database/migration下面的类，但报错Class 'databaseMigrationsCreateYyAuthRuleTable' not found，看起来一切似乎都没有问题，phpstorm中ctrl键也是可以键入该类文件的，百度了很久我不知该怎么办，请问该怎么解决？


代码：
在appModelsClientGenerate.php中

public function createDataTables()
{
    return \database\Migrations\CreateYyAuthRuleTable::getInstance()->up();
}

在/database/migrations/CreateYyAuthRuleTable.php中

namespace database\Migrations;

 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Schema;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Database\Migrations\Migration;

class CreateYyAuthRuleTable extends Migration
{

    public static $instance;

    public static function getInstance(){
        if(!self::$instance)
            self::$instance = new self();

        return self::$instance;
   }

    /**
     * Run the migrations.
     *
     * @return mixed
     */
    public function up()
    {
        $tabel = request()->session()->get('client_username').'_yy_auth_rule';
        return Schema::hasTable($tabel);
                Schema::create($tabel, function (Blueprint $table) {
                    $table->increments('id');
                    $table->string('name', 250)->comment('权限点');
                    $table->string('title', 250)->comment('名称');
                    $table->tinyInteger('type')->comment('类型');
                    $table->tinyInteger('status')->comment('1 启用; 0 禁用');
                    $table->tinyInteger('menu')->comment('1 作为菜单显示; 0 不显示');
                    $table->string('condition',250);
                    $table->integer('pid')->comment('父级ID');
                    $table->string('remark',250)->comment('备注');
                    $table->string('icon',125)->comment('图标');
                    $table->integer('sort')->comment('排序');
                    $table->tinyInteger('deleted')->comment('是否删除');
                });
    }
}

报错信息