feat(authenticate): add authenticate functionality

[goncalo-frade-iohk]

WARNING: The next few PRs will break CI and builds. This is expected.

[github-actions]

🦙 MegaLinter status: ❌ ERROR

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ REPOSITORY	checkov	yes		no	8.35s
❌ REPOSITORY	devskim	yes		90	22.59s
✅ REPOSITORY	dustilock	yes		no	0.01s
✅ REPOSITORY	gitleaks	yes		no	4.72s
✅ REPOSITORY	git_diff	yes		no	0.15s
✅ REPOSITORY	secretlint	yes		no	2.31s
✅ REPOSITORY	syft	yes		no	0.58s
✅ REPOSITORY	trivy	yes		no	2.31s
✅ YAML	prettier	1		0	0.43s
✅ YAML	v8r	1		0	1.71s
✅ YAML	yamllint	1		0	0.22s

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