What is JSON Web Token (JWT)?

JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way of securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed. The client will need to authenticate with the server using the credentials only once. During this time the server validates the credentials and returns the client a JSON Web Token (JWT). For all future requests, the client can authenticate itself to the server using this JSON Web Token (JWT) and so it does not need to send the credentials like username and password.

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