AuthenticationFailureException is suppressed if invalid credentials are supplied

Task<ICluster> cluster = null;

try

            {

                ClusterOptions options = new ClusterOptions()

                {

                    UserName = pConfig.user,

                    Password = pConfig.password,

                    ConnectionString = pConfig.server

                };

                cluster = Cluster.ConnectAsync(options);

                cluster.Wait();

            }

            catch (Exception e)

            {

                Log.Error(e.Message);

                return null;

            }