<ul><li>Authentication is the process of verifying if a person is who they claim to be before granting access to an application or data.</li><li>Common authentication methods include Username + Password, Token-Based Authentication (like JWT), OAuth (Login with Google, Facebook, etc.), Multi-Factor Authentication (MFA), and API Key.</li><li>Different authentication methods provide varying levels of security, with MFA adding extra layers of protection, OAuth offering smoother user experience, and API Key enabling controlled access for services and developers.</li><li>An analogy of authentication in a nightclub: Username + Password is like a guest list check, Token is like a hand stamp, OAuth is like a friend with VIP access, MFA is like ID + Text Confirmation, and API Key is like a staff badge.</li></ul>

How does Authentication work & different types

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