func (ca *CertAuthority) FirstSigningKey() ([]byte, error) {
	if len(ca.SigningKeys) == 0 {
		return nil, trace.NotFound("%v has no signing keys", ca.ID())
	}
	return ca.SigningKeys[0], nil
}
// FirstSigningKey returns first signing key or returns error if it's not here
FirstSigningKey returns first signing key or returns error if it's not here
// FirstSigningKey returns first signing key or returns error if it ' s not here
func (ca *CertAuthority) FirstSigningKey() ([]byte, error) {
	if len(ca.SigningKeys) == 0 {
		return nil, trace.NotFound("%v has no signing keys", ca.ID())
	}
	return ca.SigningKeys[0], nil
}
func ( ca * CertAuthority ) FirstSigningKey ( ) ( [ ] byte , error ) { if len ( ca . SigningKeys ) == 0 { return nil , trace . NotFound ( " " , ca . ID ( ) ) } return ca . SigningKeys [ 0 ] , nil }
FirstSigningKey returns first signing key or returns error if it's not here
FirstSigningKey returns first signing key or returns error if it ' s not here