How to deal with the same barcodes when merging the bam files from multiple samples?

Hi Tim,
Thanks for developing this tool! It's very handy. Just one question: If I want to merge the bam files from multiple samples after running ```sinto filterbarcodes```, how can I avoid the issue arising from the use of same cell barcodes from different bam files? Can I add a prefix (e.g. sample ID) to cell barcode name when I run ```sinto filterbarcodes```?
Many thanks!