Merge pull request #381 from Esri/Ting/Update-AuthURLs

[Update] Redirected URLs in README for Authenticate with OAuth

Author: yo1995

Shared/Samples/Authenticate with OAuth/README.md

@@ -30,9 +30,9 @@ Upon launch, a web map containing premium content will load. You will be prompte
 
 ## Additional information
 
-The workflow presented in this sample works for all SAML based enterprise (IWA, PKI, Okta, etc.) & social (Facebook, Google, etc.) identity providers for ArcGIS Online or Portal. For more information, see the topic [Set up enterprise logins](https://doc.arcgis.com/en/arcgis-online/administer/enterprise-logins.htm).
+The workflow presented in this sample works for all SAML based enterprise (IWA, PKI, Okta, etc.) & social (Facebook, Google, etc.) identity providers for ArcGIS Online or Portal. For more information, see the topic [Set up enterprise logins](https://doc.arcgis.com/en/arcgis-online/administer/saml-logins.htm).
 
-For additional information on using OAuth in your app, see the topic [OAuth 2.0](https://developers.arcgis.com/documentation/mapping-apis-and-services/security/oauth-2.0/) and [Serverless native and mobile app workflow](https://developers.arcgis.com/documentation/mapping-apis-and-services/security/arcgis-identity/serverless-native-apps/).
+For additional information on using OAuth in your app, see the topic [OAuth 2.0](https://developers.arcgis.com/documentation/mapping-apis-and-services/security/oauth-2/) and [Serverless native and mobile app workflow](https://developers.arcgis.com/documentation/mapping-apis-and-services/security/user-authentication/serverless-native-flow/).
 
 ## Tags