エラー SQLSTATE[HY000] [2002]

 Illuminate\Database\QueryException 

  SQLSTATE[HY000] [2002] Connection refused (SQL: select * from information_schema.tables where table_schema = example_app and table_name = migrations and table_type = 'BASE TABLE')

  at vendor/laravel/framework/src/Illuminate/Database/Connection.php:760
    756▕         // If an exception occurs when attempting to run a query, we'll format the error
    757▕         // message to include the bindings with SQL, which will make this exception a
    758▕         // lot more helpful to the developer instead of just the database's errors.
    759▕         catch (Exception $e) {
  ➜ 760▕             throw new QueryException(
    761▕                 $query, $this->prepareBindings($bindings), $e
    762▕             );
    763▕         }
    764▕     }

      +39 vendor frames 
  40  artisan:37
      Illuminate\Foundation\Console\Kernel::handle()