private static async Task<string> GetCohortCustomByCohortId(CohortService cs, string cohortId)
 {
     try
     {
         var result = await cs.GetCustomById(cohortId);
         return result;
     }
     catch (Exception ex)
     {
         //when there isn't a custom yet, SLC throw a 404
         return "";
     }
     
 }