All Retro Resources use the FiveM escrow system (Excluding: Open Sources), which means scripts are linked to your FiveM account (the account you used on Tebex).
In order to work, the resource must be run in a server which is using a server key created by the same FiveM account you used on Tebex. You can create a server key in CFX.re Portal.
After creating the server key, add it to the server.cfg file as follows:
sv_licenseKey"cfxk_xxxxxxxxxxxxxxxxxxxxx_xxxxxx"
I want to use resources from another Fivem account.
You cannot directly use resources belonging to a different account. This is because resources encrypted by the Fivem Escrow system can only run on servers that are assigned a sv_licenseKey by the account that owns the license.
However, you have two options to resolve this:
Transfer the resource to the Your Fivem account: Go to the CFX.re Portal Assets section. Select the resource and click the TRANSFER button above.