fix links (#525)

Author: nathan-contino-mongo

source/triggers/authentication-triggers.txt

@@ -1,3 +1,5 @@
+.. _authentication-triggers:
+
 =======================
 Authentication Triggers
 =======================

source/tutorial/realm-app.txt

@@ -356,8 +356,8 @@ managing the Task Tracker backend.
 Now that we can view the configuration of our app in the Realm UI, we
 can take a look at all of the configuration uploaded from the JSON in
 ``realm-tutorial-backend``. If you'd rather jump straight into a client
-SDK guides, you can find the links in the :ref:`What's Next? section
-<client-sdk-guides>`.
+SDK guides, you can find the links in the
+:ref:`What's Next? section <client-sdk-guides>` below.
 
 Schema
 ~~~~~~
@@ -383,7 +383,7 @@ applications, with minor exceptions.
 .. see::
 
    To learn more about schemas in {+service+}, see the
-   :ref:`documentation on Realm Schema <schema>`.
+   :ref:`documentation on Realm Schemas <mongodb-schemas>`.
 
 Authentication
 ~~~~~~~~~~~~~~
@@ -503,6 +503,8 @@ start adding to-do tasks or even other users as project members.
    To learn more about triggers in {+service+}, see the
    :ref:`documentation on triggers <triggers>`.
 
+.. _client-sdk-guides:
+
 What's Next?
 ------------
 
@@ -513,8 +515,6 @@ Now that you have a working Realm application, you can follow one of our client
 application tutorials to connect to your Realm app and manage tasks from a
 mobile or web application.
 
-.. client-sdk-guides::
-
 - :doc:`iOS (Swift) </tutorial/ios-swift>`
 - :doc:`Android (Kotlin) </tutorial/android-kotlin>`
 - :doc:`React Native (JavaScript) </tutorial/react-native>`