What return JWT verify?

jwt.verify(token, secretOrPublicKey, [options, callback]) (Synchronous) If a callback is not supplied, function acts synchronously. Returns the payload decoded if the signature is valid and optional expiration, audience, or issuer are valid . If not, it will throw the error.

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Why do we need JWT?

Information Exchange: JWTs are a good way of securely transmitting information between parties because they can be signed , which means you can be sure that the senders are who they say they are. Additionally, the structure of a JWT allows you to verify that the content hasn’t been tampered with.

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