if err != nil {
			c.Fatalf("policy add error: %v", err)
		}
	}

	makeSTSClient := func(user, password string) *minio.Client {
		// Generate web identity JWT by interacting with OpenID IDP.
		token, err := MockOpenIDTestUserInteraction(ctx, clientApp, user, password)
		if err != nil {
			c.Fatalf("mock user err: %v", err)
		}

		// Generate STS credential.