AccessToken 和 IdToken 是 JSON Web Token (opens new window)，有效时间通常较短。通常用户在获取资源的时候需要携带 AccessToken，当 AccessToken 过期后，用户需要获取一个新的 AccessToken。
Refresh Token 用于获取新的 AccessToken。这样可以缩短 AccessToken 的过期时间保证安全，同时又不会因为频繁过期重新要求用户登录。
用户在初次认证时，Refresh Token 会和 AccessToken、IdToken 一起返回。你的应用必须安全地存储 Refresh Token，它的重要性和密码是一样的，因为 Refresh Token 能够一直让用户保持登录。
以下是 Token 端点返回的 Refresh Token：
{
"access_token": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6InIxTGtiQm8zOTI1UmIyWkZGckt5VTNNVmV4OVQyODE3S3gwdmJpNmlfS2MifQ.eyJqdGkiOiJ4R01uczd5cmNFckxiakNRVW9US1MiLCJzdWIiOiI1YzlmNzVjN2NjZjg3YjA1YTkyMWU5YjAiLCJpc3MiOiJodHRwczovL2F1dGhpbmcuY24iLCJpYXQiOjE1NTQ1Mzc4NjksImV4cCI6MTU1NDU0MTQ2OSwic2NvcGUiOiJvcGVuaWQgcHJvZmlsZSBvZmZsaW5lX2FjY2VzcyBwaG9uZSBlbWFpbCIsImF1ZCI6IjVjYTc2NWUzOTMxOTRkNTg5MWRiMTkyNyJ9.wX05OAgYuXeYM7zCxhrkvTO_taqxrCTG_L2ImDmQjMml6E3GXjYA9EFK0NfWquUI2mdSMAqohX-ndffN0fa5cChdcMJEm3XS9tt6-_zzhoOojK-q9MHF7huZg4O1587xhSofxs-KS7BeYxEHKn_10tAkjEIo9QtYUE7zD7JXwGUsvfMMjOqEVW6KuY3ZOmIq_ncKlB4jvbdrduxy1pbky_kvzHWlE9El_N5qveQXyuvNZVMSIEpw8_y5iSxPxKfrVwGY7hBaF40Oph-d2PO7AzKvxEVMamzLvMGBMaRAP_WttBPAUSqTU5uMXwMafryhGdIcQVsDPcGNgMX6E1jzLA",
"expires_in": 3600,
"id_token": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6InIxTGtiQm8zOTI1UmIyWkZGckt5VTNNVmV4OVQyODE3S3gwdmJpNmlfS2MifQ.eyJzdWIiOiI1YzlmNzVjN2NjZjg3YjA1YTkyMWU5YjAiLCJub25jZSI6IjIyMTIxIiwiYXRfaGFzaCI6Ik5kbW9iZVBZOEFFaWQ2T216MzIyOXciLCJzaWQiOiI1ODM2NzllNC1lYWM5LTRjNDEtOGQxMS1jZWFkMmE5OWQzZWIiLCJhdWQiOiI1Y2E3NjVlMzkzMTk0ZDU4OTFkYjE5MjciLCJleHAiOjE1NTQ1NDE0NjksImlhdCI6MTU1NDUzNzg2OSwiaXNzIjoiaHR0cHM6Ly9hdXRoaW5nLmNuIn0.IQi5FRHO756e_eAmdAs3OnFMU7QuP-XtrbwCZC1gJntevYJTltEg1CLkG7eVhdi_g5MJV1c0pNZ_xHmwS0R-E4lAXcc1QveYKptnMroKpBWs5mXwoOiqbrjKEmLMaPgRzCOdLiSdoZuQNw_z-gVhFiMNxI055TyFJdXTNtExt1O3KmwqanPNUi6XyW43bUl29v_kAvKgiOB28f3I0fB4EsiZjxp1uxHQBaDeBMSPaRVWQJcIjAJ9JLgkaDt1j7HZ2a1daWZ4HPzifDuDfi6_Ob1ZL40tWEC7xdxHlCEWJ4pUIsDjvScdQsez9aV_xMwumw3X4tgUIxFOCNVEvr73Fg",
"refresh_token": "WPsGJbvpBjqXz6IJIr1UHKyrdVF",
"scope": "openid profile offline_access phone email",
"token_type": "Bearer"
}
应用携带 Refresh Token 向 Token 端点发起请求时，Authing 每次都会返回相同的 Refresh Token 和新的 AccessToken、IdToken，直到 Refresh Token 过期。