Customers can create Virtual servers in 2 ways.

1. You can purchase a "prepaid" virtual server through WHMCS.
2. Can create "pay-as-you-go" virtual server via SolusVM administration panel.

If the user wants to use 2 billing methods:
Will make purchases through WHMCS to create a "prepaid" virtual server.
To purchase "pay-as-you-go" packages, Solusvm will create a server through the administration panel.

But using it this way causes a problem like this.
The user purchased 2 "prepaid" virtual servers from WHMCS.
And he created 1 "pay-as-you-go" package via the Solusvm management panel.
If the user enters the Solusvm Administration panel, he will see 3 servers. 2 of them are servers created via WHMCS module and 1 is via Solusvm. The user may accidentally delete the server he/she purchased prepaid while managing it as he/she wishes from the solusvm management panel. For this reason, the order must be created again via WHMCS. In order to avoid mixing two types of billing methods,

Servers created with the module and servers created through the Solusvm administration panel can be kept separate.