php artisan vendor:publish --provider="Prettus\RequestLogger\Providers\LoggerServiceProvider"

import DB with this line first, 

use Illuminate\Support\Facades\DB;

check whethe the serviceprovider is added in the providers array in config/app.php

 if no then check whether the service provider class is the correct location and 

   include the serivce provider in the providers array in config.app.php

​

check whethe the serviceprovider is added in the providers array in config/app.php

 if no then check whether the service provider class is the correct location and 

   include the serivce provider in the providers array in config.app.php

​