Fix RN tutorial code snippet

source/includes/steps-tutorial-react-native.yaml

@@ -43,13 +43,16 @@ content: |
      cd ..
 
   Once the dependency installations are complete, you can run the app using one
-  of the following commands, depending on whether you want to run on Android or
-  iOS:
+  of the following commands, depending on whether you want to run on iOS:
 
   .. code-block:: shell
 
      npx react-native run-ios
-     # OR
+
+  Or Android (note: you may need to install Android development tools):
+
+  .. code-block:: shell
+
      npx react-native run-android
 ---
 title: Explore the App Structure

source/tutorial/generated/code/final/AuthProvider.codeblock.user-realm-cleanup.js

@@ -1,19 +1,9 @@
-  return () => {
-    // cleanup function
-    const userRealm = realmRef.current;
-    if (userRealm) {
-      userRealm.close();
-      realmRef.current = null;
-      setProjectData([]); // set project data to an empty array (this prevents the array from staying in state on logout)
-    }
-  };
-}, [user]);
-
-// :code-block-start: sign-in
-// The signIn function takes an email and password and uses the
-// emailPassword authentication provider to log in.
-const signIn = async (email, password) => {
-  const creds = Realm.Credentials.emailPassword(email, password);
-  const newUser = await app.logIn(creds);
-  setUser(newUser);
+return () => {
+  // cleanup function
+  const userRealm = realmRef.current;
+  if (userRealm) {
+    userRealm.close();
+    realmRef.current = null;
+    setProjectData([]); // set project data to an empty array (this prevents the array from staying in state on logout)
+  }
 };

tutorial/rn/providers/AuthProvider.js

@@ -72,6 +72,7 @@ const AuthProvider = ({ children }) => {
     // :replace-with:
     //// TODO: Return a cleanup function that closes the user realm.
     // :hide-end:
+    // :code-block-end:
   }, [user]);
 
   // :code-block-start: sign-in