public function discardStaff($empId)
 {
     if (!HospitalEmployee::isStaff()) {
         return response()->json(["success" => false, "error" => 'notlogin or notvalid']);
     }
     $emp = HospitalEmployee::where('emp_id', $empId)->first();
     $usr = User::find($empId);
     if ($emp->valid) {
         // echo 'valid=false';
         return response()->json(["success" => false, "error" => 'valid = true']);
     }
     // DB::table('HospitalEmployee')->where('emp_id',$empId)->delete();
     $emp->delete();
     $usr->delete();
     return response()->json(["success" => true]);
 }
 public function getLastAppointment($patient_id)
 {
     if (!Patient::isPatient() && !HospitalEmployee::isDoctor() && !HospitalEmployee::isStaff()) {
         return response()->json(["success" => false, "error" => 'notlogin or notvalid']);
     }
     return response()->json(["success" => true, "data" => Appointment::getLastAppointment($patient_id)]);
 }