Created Update Embed Token (markdown)

Update-Embed-Token.md

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+## setAccessToken
+setAccessToken can be used to update underlying Embed token without reloading the embedded report.
+This method can be helpful in different cases:
+1. After SaveAs
+After SaveAs, the new report will be shown, while the underlying token is giving access to the old report.
+In such case, you should generate a new token to see the new report, and use setAccessToken to set new generated token.
+
+2. Token is expired or near expiry
+If you want to change a token which is expired or near expiry, you need to use setAccessToken.
+
+### Usage Example
+
+```javascript
+report.setAccessToken("eyJ0eXAiOiJKV1Qi..00YU")
+  .catch(error => { ... });
+```
+
+## getAccessToken
+getAccessToken returns the current embed token.
+
+### Usage Example
+
+```javascript
+var token = report.getAccessToken();
+```