added enums to replace constants

src/guards/unit.permission.guard.ts

@@ -1,3 +1,4 @@
+import { SpaceType } from '@app/common/constants/space-type.enum';
 import { SpacePermissionService } from '@app/common/helper/services/space.permission.service';
 import {
   BadRequestException,
@@ -24,7 +25,7 @@ export class UnitPermissionGuard implements CanActivate {
       await this.permissionService.checkUserPermission(
         unitUuid,
         user.uuid,
-        'unit',
+        SpaceType.UNIT,
       );
 
       return true;