If you can not see user’s account in WHM >> List account, please use following steps to fix it.
Check the following files :
1. Check if the domain is present in this list
2.Username should be replaced by the actual username
3. Check if this file exists
If all the above are giving proper output then run the following :
It will update all users domain and recheck the account or domain in WHM >> List account. It will be listed there.