A token can be generated at the following address (account login required):
https://www.gmodstore.com/settings/personal-access-tokens
The permissions to be granted when creating the token are:
products:read, product-versions:read, product-versions:download, users:read et user-purchases:read.
Please note that the token will be displayed only once when it is created, so remember to save it somewhere safe!
Once retrieved, simply paste it into the field below. Do not share it with others unless you know what you are doing.