public function storeReport(ReportRequest $request, AppMailer $mailer)
 {
     $input = $request->all();
     $input['closed'] = false;
     $input['owner_id'] = \Auth::user()->id;
     $users = $input['friends'];
     $report = ExpenseReport::create($input);
     $report->users()->attach($users);
     $mailer->sendAddedToReportNotification($report);
     return redirect('expenseReports/' . $report->id);
 }