The shoe companies control their distribution quite tightly.
You will have to contact them directly.
For example:
https://help-en-us.nike.com/app/answer/article/new-account/a_id/710/country/us
However: (From the above page)
"No, Nike is not currently seeking online accounts."
Be careful. If you Google "real Nikes wholesale", you will find a ton of sites; all of which are selling cheap counterfeits.