Add redirection and logout button to the login functionality #427

Job	Run time
markdown-check / markdown-check	13s
lint-test / lint-test	19s
build-and-push-gcr / build-push-image	2m 45s
pr-labelling / labeler	4s
repo-standard / validate-name	37s
build-and-push-gcr / remove-old-image	0s
	3m 58s

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