get https://api.linode.com//managed/credentials/
Returns a single Managed Credential.
This operation can only be accessed by the unrestricted users of an account.
linode-cli managed credential-view 9991
<https://techdocs.akamai.com/cloud-computing/docs/getting-started-with-the-linode-cli>
account:read_write
<https://techdocs.akamai.com/linode-api/reference/get-started#oauth>