Create branch in Google Cloud source repository

I have created repository in google cloud source repository . It got created with default branch “Master” , i want to create repository with two branch or need to add branch but i am not getting option.

Can anyone help?

Do it directly in git: git branch then git push -u

Thanks @vvk it worked for me , I was missing “r” in below

https://source.developers.google.com/p//r/