You could use migrate:refresh command that will roll back all of your migrations and then execute the migrate command. This command effectively re-creates your entire database :
php artisan migrate:refresh
And you may use the --class option to specify a specific seeder class to run individually :
php artisan db:seed --class=UserTableSeeder
The full code will be :
php artisan migrate:refresh
php artisan db:seed --class=UserTableSeeder
Hope this helps.