Nope its not possible, because in reseller mode, the reseller wont give you access to admin api`s.
And without admin api nothing is possible. All you have is client api and with client api nothing can be achieved.
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The SolusVM WHMCS reseller module is pretty poor IMHO. The SolusVM Reseller System itself isn't much better. For instance, reseller accounts cannot modify resources assigned to VPS' - the hosting provider of that VPS Reseller must be contacted. That is one of the biggest issues from my experience.