public function invite(Request $request)
 {
     $limits = array(0, 2, 3, 99999999999, 0);
     $user = $request->user();
     $userId = $user->id;
     $userRole = $user->type;
     /**
      * Check if user has right to invite.
      * User has right if has no parent_user, has available limit and inviting email not registered
      */
     if ($user->parent_user) {
         $request->session()->flash('error', "Sorry you have no right to create team.");
         return redirect('team');
     }
     $email = $request->get('email');
     $member = User::where('email', '=', $email)->first();
     if ($member) {
         if (!$member->activation) {
             $request->session()->flash('error', "The invitation is already sent");
             return redirect('team');
         }
         $request->session()->flash('error', "Sorry, you can't send request to registered users.");
         return redirect('team');
     } else {
         $member = TeamInvitation::where('accept_email', '=', $request->get('email'))->first();
         if ($member) {
             $request->session()->flash('error', "Sorry, you can't send request to invited user.");
             return redirect('team');
         }
     }
     $existingMembers = Team::where('member_id', '=', $userId)->get();
     $expiredLimit = count($existingMembers) - 1;
     $invitedMembers = TeamInvitation::where('request_id', '=', $userId)->get();
     $expiredLimit += count($invitedMembers);
     if ($limits[$userRole] <= $expiredLimit) {
         $request->session()->flash('error', "Sorry, your limit is expired.");
         return redirect('team');
     } elseif ($request->user()->type == 4 || $request->user()->parent_user) {
         $request->session()->flash('error', "you can't invite team members");
         return redirect('team');
     }
     /**
      * Need create record in team_invitation
      */
     $teamInvitation = new TeamInvitation();
     $teamInvitation->request_id = $userId;
     $teamInvitation->request_user_email = $user->email;
     $activationCode = str_random(80);
     $teamInvitation->accept_id = $activationCode;
     $teamInvitation->accept_email = $email;
     $teamInvitation->status = 0;
     $teamInvitation->save();
     /**
      * Sending invitation email
      */
     //        $this->sendEmail($user->name, $user->email, $activationCode);
     $request->session()->flash('message', "Invitation successfully sent.");
     return redirect('team');
 }