@spec create(String.t(), String.t(), NervesHubCLI.API.Auth.t(), String.t() | nil) ::
  {:error, any()} | {:ok, any()}

Adds a new CA certificate to NervesHub. The certificate passed should be pem encoded binary and not a path to the cert file.

Verb: POST Path: /orgs/:org_name/ca_certificates

@spec delete(String.t(), String.t(), NervesHubCLI.API.Auth.t()) ::
  {:error, any()} | {:ok, any()}

Removes the CA certificate with the specified serial number from NervesHub.

Verb: DELETE Path: /orgs/:org_name/ca_certificates/:serial

@spec list(String.t(), NervesHubCLI.API.Auth.t()) :: {:error, any()} | {:ok, any()}

List all ca certificates for an organization

Verb: GET Path: /orgs/:org_name/ca_certificates