Handle accidental double-checkins

					my $user = $self->get_user_status;

					if ( $user->{checked_in} or $user->{cancelled} ) {

                # If a user is already checked in, we assume that they forgot to

                # check out and do it for them.

						if (    $user->{train_id} eq $train_id

							and $user->{dep_ds100} eq $status->{station_ds100} )

						{

							# checking in twice is harmless

							return ( $train, undef );

						}

						# Otherwise, someone forgot to check out first

						$self->checkout( $station, 1 );

					}