Bottlerocket - validate input user name and keys

[vignesh-goutham]

Bottlerocket only support one user with the name ec2-user and one key that user can provide. EKS-A should properly validate the inputs from the user on cluster spec and error if any other username or multiple keys are provided.

[Parit99]

I would like to work on this enhancement.. Can I please get some kind of an approval from any contributor of this repository? About Me: I am a student currently completing his Post Grad in Computer Science. I have been assigned a course component which involves contributing to any open source project. I am liking this repository and would like to start from scratch to try getting this issue fixed

[vignesh-goutham]

Hello @Parit99, thanks for expressing interest to work on this. Any contributions are welcome! Please open a pull request once you are done with your changes and assign me as a reviewer.

/assign @Parit99