Domain hosting with wordpress

[marvinbible]

A few combinations are as straightforward as introducing a module, There are numerous great modules accessible to coordinate into WordPress. The stage is broadly utilized and set up. when you merge, so it doesn’t require new credentials for current users.

[kyle_jenner21]

Hello all,
This might be irrelevant question in this forum but it is related to the topic. I am working on a wordpress Hosting website, I am only a developer so I only have different accounts. currently I am integrating everything on LOCALHOST, I have 1 WHMCS account which I am using for domain searching and registeration. I also have WHM panel in which "the owner" has already registered some domains .

The question is how can I register users from my WHMCS account to my WHM account.
If question is still unclear. let me simplify it

1 WHMCS account installed
1 WHM account installed and already working( have some customers)

How can i integrate both (or one) with Wordpress.?