code: func (k *KeyringMemberClientV1) Post(ctx context.Context, members []envelope.KeyringMemberV1) ([]envelope.KeyringMemberV1, error) {
  	resp := []envelope.KeyringMemberV1{}
  	err := k.client.RoundTrip(ctx, "POST", "/keyring-members", nil, members, &resp)
  	return resp, err
  }
docs: // Post sends a creation requests for a set of KeyringMember objects to the
  // registry.