auth tenant https://github.com/fabric8-services/fabric8-auth/blob/master/account/init_tenant.go#L41

client.go

func createClient(ctx context.Context, config tenantConfig) (*tenant.Client, error) {
	u, err := url.Parse(config.GetTenantServiceURL())
	if err != nil {
		return nil, err
	}

	c := tenant.New(client.HTTPClientDoer(http.DefaultClient))
	c.Host = u.Host
	c.Scheme = u.Scheme
	c.SetJWTSigner(goasupport.NewForwardSigner(ctx))
	return c, nil
}