These dark net sites are not safe to use because these sites can harm your PC you can lost your data and also unauthorized access to your PC will be given to hackers.
Buying the license or passport is much hectic and if you want o buy it you can take the services of such websites to do your work fastly without any hassle.
I dont know much but according to google GMrepo (data repository for Gut Microbiota) is a database of curated and consistently annotated human gut metagenomes.
Honestly speaking it took me time to understand all of the stuff but I seriously enjoyed the write-up. I have a very less knowledge about nike air thats why i am unable to give my opinion.