Find Users with Custom Permission in Apex

UsersWithPermission.apex

Set < Id > permissionSetIds = new Set < Id >();
        List < User > userList = new List < User >();
for ( SetupEntityAccess access : [ SELECT ParentId FROM SetupEntityAccess 
                                           WHERE SetupEntityId IN ( SELECT Id 
                                                                    FROM CustomPermission 
                                                                    WHERE DeveloperName = 'Allow_Save_Offer_Owner_Edit' )
                                 ]){
                                    permissionSetIds.add(access.ParentId); 
                                 } 
System.debug(permissionSetIds);
 
 userList = [ SELECT Username FROM User WHERE Id IN (
                SELECT AssigneeId FROM PermissionSetAssignment
                WHERE PermissionSetId IN :permissionSetIds) ];


System.debug(userList);