Can you give a sample log in program using JWT?

[pilipinass123]

i’m having a trouble understanding JWT. can you help me?

[jerdog]

Sure @pilipinass123 - there are a few good resources for getting started with JWT:

• Get Started with JSON Web Tokens
• Similar content to the above - JSON Web Tokens
• JWT eBook
• Auth0 Quickstarts

[ricardo.batista]

A [JWT] (RFC 7519: JSON Web Token (JWT)) defines a way to transfer data between two parties. It consists of three parts separated by dots (.), which are:

• Header
• Payload
• Signature

Therefore it typically looks like: xxxxx.yyyyy.zzzzz You can use https://jwt.io/ to decode it and see the claims it contains.

To get an id token or an [access token] (Access Tokens) you can use Auth0.js, Lock.js, [the Authentication API] (https://auth0.com/docs/api/authentication) or any other library for another language. A common use would be to use the [hosted login page] (Auth0 Universal Login) with Auth0.js and a SPA client as:

<script src="http://cdn.auth0.com/js/auth0/9.1.0/auth0.min.js"></script>
<script>
var webAuth = new auth0.WebAuth({
  domain: {YOUR_AUTH0_DOMAIN}, 
  clientID: {SPA_CLIENT_ID},
  audience: {API_AUDIENCE},
  redirectUri: '{CALLBACK_URL}', 
  scope: 'openid profile',
  responseType: 'token id_token'
});
webAuth.authorize();
</script>

On the callback from the authorize request, you can use parseHash to get the JWT tokens:

webAuth.parseHash(function(err, authResult) {
  if (authResult) {
    var accessToken = authResult.accessToken;
    var idToken = authResult.idToken;

     // any other logic...
  }
}

You can see more detailed information about JWTs [here] (JSON Web Tokens) and you should also check [OIDC conformant clients] (Applications in Auth0), [OIDC authentication] (OpenID Connect Protocol) and [how to call your APIs with the access token] (Access Tokens)