Verify two domains in namecheap: www.example.com and example.com

I have a personal blog with my GitLab user. I buy a domain and I can’t verify the domain “www.example.com”. I only verified one domain (example.com). I read some info but doesn’t work (here, here and here).

My namecheap DNS config is that:

A Record | @ | 35.185.44.232 | Automatic
CNAME Record | @ | username.gitlab.io. | Automatic ---> (example.com)
CNAME Record | www | username.gitlab.io. | Automatic ---> (www.example.net)
TXT Record | @ | gitlab-pages-verification-code=aa5c52822sdfdasfdasfee2323434234
TXT Record | @ | gitlab-pages-verification-code=8adfafadf34234f4545fdfg454tghy54

Please, help me to link my domain and subdomain.