fix: resolve pr review comments

Signed-off-by: Yeganathan S <63534555+skwowet@users.noreply.github.com>

Author: skwowet

backend/src/utils/mapper.ts

@@ -58,7 +58,7 @@ export function groupMemberOrganizations<T extends IMemberOrganization>(rows: T[
       })[0]
 
       if (displayRow.id) {
-        hiddenEmailDomainIds.add(displayRow.id)
+        hiddenEmailDomainIds.add(emailDomainRow.id)
 
         const existingGroup = displayGroups.get(displayRow.id)
         if (existingGroup) {