When the user purchases a vps through WHMCS. When the admin approves this virtual server, the Solusvm module creates this virtual server in the SVM panel and a user account is created in SVM with the e-mail address of the user in WHMCS.

To use Cloud hosting "pay-as-you-go" billing, the user clicks on the cloud hosting tab in WHMCS and confirms his e-mail address. Then, when he presses the "I accept" button on the "Accept Terms of Use" screen, he encounters the following error:

Email address already in use on the SolusVM 2.0 system. Please use a different email address or contact support.

For the virtual server purchased by WHMCS on behalf of the user, the module created a user account when creating the virtual server (but the user cannot access this account). For this reason, the user encounters this error when trying to activate the Cloud hosting service and cannot access the SolusVM management panel.