Unable to ssh ubuntu server-getting key file error

Hi Team,

I’ve setup ubuntu server(master,two worker node) using the below vagrant file. However when i try to connect the server I am getting below error. Also please can anyone confirm the root password for the below vagrant box.

No supported authentication methods available (server sent: publickey)

https://github.com/kodekloudhub/certified-kubernetes-administrator-course.gitemphasized text