fix(MK8S-196): guard getToken against missing userManager in test env #4963

Job	Run time
build-devcontainer / build-and-publish-devcontainer	24s
changed-files	11s
build_integration_container_nginx	2m 11s
unit_tests_shell_ui	37s
unit_tests_ui	0s
build-shell-ui	0s
unit_tests_crd_client_generator	0s
lint	4m 32s
build / build-devcontainer / build-and-publish-devcontainer	13s
build / build-shell-ui / shell-ui	1m 15s
build-docs	0s
unit_tests_storage_operator	0s
unit_tests_salt	0s
unit_tests_metalk8s_operator	0s
unit_tests_lib_alert_tree	0s
build / build	7m 59s
build / build-docs / build-devcontainer / build-and-publish-devcontainer	15s
build / build-docs / docs	2m 2s
integration_tests_ui	4m 43s
build / write-final-status	13s
write-final-status	10s
e2e-tests	0s
	24m 45s

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