add docs

docs/api/session.md

@@ -363,6 +363,13 @@ event. The [DownloadItem](download-item.md) will not have any `WebContents` asso
 the initial state will be `interrupted`. The download will start only when the
 `resume` API is called on the [DownloadItem](download-item.md).
 
+#### `ses.clearAuthCache(options[, callback])`
+
+* `options` ([RemovePassword](structures/remove-password.md) | [RemoveClientCertificate](structures/remove-client-certificate.md))
+* `callback` Function (optional) - Called when operation is done
+
+Clears the session’s HTTP authentication cache.
+
 ### Instance Properties
 
 The following properties are available on instances of `Session`:

docs/api/structures/remove-client-certificate.md

@@ -0,0 +1,5 @@
+# RemoveClientCertificate Object
+
+* `type` String - `clientCertificate`.
+* `origin` String - Origin of the server whose associated client certificate
+  must be removed from the cache.

docs/api/structures/remove-password.md

@@ -0,0 +1,15 @@
+# RemovePassword Object
+
+* `type` String - `password`.
+* `origin` String (optional) - When provided, the authentication info
+  related to the origin will only be removed otherwise the entire cache
+  will be cleared.
+* `scheme` String (optional) - Scheme of the authentication.
+  Can be `basic`, `digest`, `ntlm`, `negotiate`. Must be provided if
+  removing by `origin`.
+* `realm` String (optional) - Realm of the authentication. Must be provided if
+  removing by `origin`.
+* `username` String (optional) - Credentials of the authentication. Must be
+  provided if removing by `origin`.
+* `password` String (optional) - Credentials of the authentication. Must be
+  provided if removing by `origin`.