Function create_api_token_from_openssh_pem 

pub fn create_api_token_from_openssh_pem(
    pem: &str,
    local_id: EndpointId,
    max_age: Duration,
    capability: Caps,
) -> Result<Rcan<Caps>>

Create an rcan token for the api access from a PEM-encoded OpenSSH ed25519 private key.