# Get the Github issue #`number`.
	#
	# Returns `null` if the issue cannot be found.
	#
	# ~~~nitish
	# var api = new GithubAPI(get_github_oauth)
	# var repo = api.get_repo("nitlang/nit")
	# assert repo != null
	# var issue = api.get_issue(repo, 1)
	# assert issue.title == "Doc"
	# ~~~
	fun get_issue(repo_slug: String, number: Int): nullable Issue do
		return get("/repos/{repo_slug}/issues/{number}").as(nullable Issue)
	end