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----
-breadcrumbs:
-- - /developers
-  - For Developers
-page_name: about-signin-internals
-title: about-signin-internals
----
-
-**## Overview**
-
-**The “chrome://signin-internals” webpage is a special URL in chromium that displays a summary of all signin and authentication related information in Google Chrome. It is useful in the triage and pinpointing of errors that could potentially be authentication related.**
-
-**### Summary**
-
-**#### Information Displayed**
-
-    **Chrome Version - The version, branch and channel of chrome**
-
-    **Signin Status - Whether the user is signed in or not**
-
-    **User Id - The id for the currently signed in user or none if not signed
-    in.**
-
-    **Sid/Lsid - The hash of the SID/LSID for this session.**
-
-**### Last Signin Details**
-
-**#### Information Displayed**
-
-    **Type - Is this a credential or a cookie jar/OAuth based login**
-
-    **Time - The time stamp of the most recent login**
-
-    **Last OnClientLogin Status/Time - The status and timestamp of the last
-    credential based login attempt. ‘Successful’ if everything went right, an
-    error message if something went wrong.**
-
-    **Last OnOAuthLogin Status/Time - The status and timestamp of the last OAuth
-    based login attempt. ‘Successful’ if everything went right, an error message
-    if something went wrong.**
-
-    **Last OnGetUserInfo Status/Time - The status and timestamp of the last
-    attempt to fetch information about the currently authenticated user on a
-    successful login. The user info is fetched immediately after a Client or
-    OAuth login, so the timestamp should be close to one of the preceding
-    values.**
-
-**#### Room for improvement**
-
-    **Add ChromeOS specific information (Retail login, etc).**
-
-**### Token Details**
-
-**For each service, displays the hash of the current token (or 0 if we don’t have a token), the time stamp of the last token fetch attempt, and the status of the last token fetch attempt. Currently the following services are tracked.**
-
-**#### Services managed by TokenService**
-
-*   **chromiumsync**
-*   **gaia**
-*   **lso**
-*   **mobilesync**
-*   **oauth2LoginAccessToken**
-*   **oauth2LoginRefreshToken**
-
-**#### Services using OAuth2AccessTokenConsumer**
-
-*   **AppNotifyChannelSetup**
-*   **ChromeToMobile**
-*   **OperationsBase**
-*   **ProfileDownloader**
-*   **UserCloudPolicyManager**
-
-**#### Room for improvement**
-
-*   **Once OAuth2AccessTokenConsumers are migrated to use
-            OAuth2TokenService, centralize signin-internals notifications from
-            those services similar to how TokenService behaves now.**
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