Question: Is it possible to use `www.website.com/username(cpanel)` instead of:

`www.website.com/cpanel`

To access the cpanel?

Please suggest an idea.

Answer: 
No this is not possible 

But you can set redirection which will redirect www.website.com/username to www.website.com:2082 to achieve your requirements
Unless you are actually a hosting provider, you will not have the name cpanel in your url for domain name access.

At most you will have `https://www.domainname.tld:2083` for access to `cPanel`
or `https://www.domainname.tld:2087` for access to `WHM` as `root`

if your hosting provider added `cpanel` in the url it will be an automatic redirect for you. so for example if you click on `cpanel` from your share hosting provider dashboard it may route you to `https://cpanel.domainprovider.tld:2083` or in most cases it should route you to `https://yourdomainname.tld:2083` which is a cpanel access..

Thank you hope this helps