public key error (bibucket)

[micxba]

I ran this tool fine locally however when running it inside a docker container it fails at key authentication (it appears). I am setting BITBUCKET_USERNAME and BITBUCKET_PASSWORD environment variables.

2022/01/19 21:22:56 Error backing up myapp: Cloning into '/root/.gitbackup/bitbucker.org/zyx/myapp'...
Permission denied (publickey).
fatal: Could not read from remote repository.

Edit: NVM - being stupid...