What is Refresh Token

AccessToken and IdToken are JSON Web Token, and their validity is usually short. Usually, users need to carry AccessToken when obtaining resources. When AccessToken expires, users need to obtain a new AccessToken.

Refresh Token is used to obtain a new AccessToken. This can shorten the expiration time of AccessToken to ensure security, while not requiring users to log in again due to frequent expiration.

When a user authenticates for the first time, Refresh Token will be returned together with AccessToken and IdToken. Your application must store Refresh Token securely. It is as important as a password because Refresh Token can keep users logged in all the time.

The following is the Refresh Token returned by the Token endpoint:

{
  "access_token": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6InIxTGtiQm8zOTI1UmIyWkZGckt5VTNNVmV4OVQyODE3S3 gwdmJpNmlfS2MifQ.eyJqdGkiOiJ4R01uczd5cmNFckxiakNRVW9US1MiLCJzdWIiOiI1YzlmNzVjN2NjZjg3YjA1YTk yMWU5YjAiLCJpc3MiOiJodHRwczovL2F1dGhpbmcuY24iLCJpYXQiOjE1NTQ1Mzc4NjksImV4cCI6MTU1NDU0MTQ2OSw ic2NvcGUiOiJvcGVuaWQgcHJvZmlsZSBvZmZsaW5lX2FjY2VzcyBwaG9uZSBlbWFpbCIsImF1ZCI6IjVjYTc2NWUzOTM xOTRkNTg5MWRiMTkyNyJ9.wX05OAgYuXeYM7zCxhrkvTO_taqxrCTG_L2ImDmQjMml6E3GXjYA9EFK0NfWquUI2mdSM AqohX-ndffN0fa5cChdcMJEm3XS9tt6-_zzhoOojK-q9MHF7huZg4O1587xhSofxs-KS7BeYxEHKn_10tAkjEIo9QtYU E7zD7JXwGUsvfMMjOqEVW6KuY3ZOmIq_ncKlB4jvbdrduxy1pbky_kvzHWlE9El_N5qveQXyuvNZVMSIEpw8_y5iSxP xKfrVwGY7hBaF40Oph-d2PO7AzKvxEVMamzLvMGBMaRAP_WttBPAUSqTU5uMXwMafryhGdIcQVsDPcGNgMX6E1jzLA",
  "expires_in": 3600,
  "id_token": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6InIxTGtiQm8zOTI1UmIyWkZGckt5VTNNVmV4OVQyODE3S3gwd mJpNmlfS2MifQ.eyJzdWIiOiI1YzlmNzVjN2NjZjg3YjA1YTkyMWU5YjAiLCJub25jZSI6IjIyMTIxIiwiYXRfaGFzaCI6 Ik5kbW9iZVBZOEFFaWQ2T216MzIyOXciLCJzaWQiOiI1ODM2NzllNC1lYWM5LTRjNDEtOGQxMS1jZWFkMmE5OWQzZWIiLC JhdWQiOiI1Y2E3NjVlMzkzMTk0ZDU4OTFkYjE5MjciLCJleHAiOjE1NTQ1NDE0NjksImlhdCI6MTU1NDUzNzg2OSwiaXNz IjoiaHR0cHM6Ly9hdXRoaW5nLmNuIn0.IQi5FRHO756e_eAmdAs3OnFMU7QuP-XtrbwCZC1gJntevYJTltEg1CLkG7eVhd i_g5MJV1c0pNZ_xHmwS0R-E4lAXcc1QveYKptnMroKpBWs5mXwoOiqbrjKEmLMaPgRzCOdLiSdoZuQNw_z-gVhFiMNxI05 5TyFJdXTNtExt1O3KmwqanPNUi6XyW43bUl29v_kAvKgiOB28f3I0fB4EsiZjxp1uxHQBaDeBMSPaRVWQJcIjAJ9JLgkaD t1j7HZ2a1daWZ4HPzifDuDfi6_Ob1ZL40tWEC7xdxHlCEWJ4pUIsDjvScdQsez9aV_xMwumw3X4tgUIxFOCNVEvr73Fg",
  "refresh_token": "WPsGJbvpBjqXz6IJIr1UHKyrdVF",
  "scope": "openid profile offline_access phone email",
  "token_type": "Bearer"
}

When the application sends a request to the Token endpoint with the Refresh Token, GenAuth will return the same Refresh Token and new AccessToken, IdToken each time until the Refresh Token expires.