}

// Error creates an error message and wraps
// it with the error type specified in the type parameter
func Error[T ErrorConfig, PT interface {
	*T
	setMsg(string)
}](format string, vals ...interface{},
) T {
	pt := PT(new(T))
	pt.setMsg(fmt.Sprintf(format, vals...))
	return *pt
}

// Errorf formats an error and returns it as a generic config error
func Errorf(format string, vals ...interface{}) ErrConfigGeneric {

	if !sa.Credentials.IsServiceAccount() {
		return UserIdentity{}, nil, errNoSuchServiceAccount
	}

	var embeddedPolicy *policy.Policy

	pt, ptok := jwtClaims.Lookup(iamPolicyClaimNameSA())
	sp, spok := jwtClaims.Lookup(policy.SessionPolicyName)
	if ptok && spok && pt == embeddedPolicyType {
		policyBytes, err := base64.StdEncoding.DecodeString(sp)
		if err != nil {
			return UserIdentity{}, nil, err
		}