Fixing env var usage in makfile

Makefile

@@ -129,7 +129,7 @@ test-unit: ## Run unit tests
 test-integration: $(GO_BIN)/commander ## Run integration tests. To run a specific test pass the FILTER var. Usage: `make test-integration FILTER="attack protection"`
 	${call print, "Running integration tests"}
 	@$(MAKE) install # ensure fresh install prior to running test
-	auth0 tenants add $\AUTH0_CLI_CLIENT_DOMAIN --client-id $\AUTH0_CLI_CLIENT_ID --client-secret $\AUTH0_CLI_CLIENT_SECRET  && commander test ./test/integration/test-cases.yaml --filter "$(FILTER)"; \
+	auth0 tenants add ${AUTH0_CLI_CLIENT_DOMAIN} --client-id ${AUTH0_CLI_CLIENT_ID} --client-secret ${AUTH0_CLI_CLIENT_SECRET}  && commander test ./test/integration/test-cases.yaml --filter "$(FILTER)"; \
 	exit_code=$$?; \
 	bash ./test/integration/scripts/test-cleanup.sh; \
 	exit $$exit_code