Can I use whitening soap/products in between laser hair removal sessions?

Just started getting laser hair removal and I had my first session today. I noticed my vagina is darker than my skin tone which is slightly embarrassing as well as having an odd few marks from shaving and on top of that dark underarms. I would like to use kojic soap, would that affect the treatment/laser and sensitivity towards my skin next time I go in 6 weeks or is it okay to use the kojic soap in those areas?