my page is accessible at username.github.io/repositoryname.github.io/ but not on repname.github.io

Hello, all, Can someone tell me why my page opens just fine at: https://huzaifahere.github.io/huzaifadiaries.github.io/ , but at huzaifadiaries.github.io 

Can someone please tell how can I set up webpage on huzaifadiaries.github.io rather than https://huzaifahere.github.io/huzaifadiaries.github.io/  

My github repository is : https://github.com/huzaifahere/huzaifadiaries.github.io

Your username is huzaifahere, but the repo is called huzaifadiaries.github.io

The repository has to match your user/organisation name, to be displayed under :username/:orgname.github.io

Otherwhise will it default to :username.github.io/:repo-name

See this page for more information:

https://help.github.com/en/github/working-with-github-pages/about-github-pages#types-of-github-pages-sites