key property
Key that should be added to the environment.
Supported formats are ssh-dss (see RFC4253), ssh-rsa (see RFC4253),
ecdsa-sha2-nistp256 (see RFC5656), ecdsa-sha2-nistp384 (see RFC5656)
and ecdsa-sha2-nistp521 (see RFC5656). It should be structured as
<format> <content>, where <content> part is encoded with Base64.
Implementation
core.String? key;