[skip ci] docs auth install

docs/auth/android.md

@@ -8,4 +8,36 @@ description: Manually integrate Authentication into your Android application.
 > The following steps are only required if your environment does not have access to React Native
 auto-linking. 
 
-## TODO
+#### Add Authentication to Gradle Settings
+
+**`android/settings.gradle`**:
+```groovy
+include ':@react-native-firebase_auth'
+project(':@react-native-firebase_auth').projectDir = new File(rootProject.projectDir, './../node_modules/@react-native-firebase/auth/android')
+```
+
+#### Add Authentication to App Gradle Dependencies
+
+**`android/app/build.gradle`**:
+```groovy{4}
+// ..
+dependencies {
+  // ..
+  implementation project(path: ":@react-native-firebase_auth")
+}
+```
+
+#### Add Authentication to Main Android Application:
+
+**`android/app/src/main/java/**/MainApplication.java`**:
+```java{2,8}
+// ..
+import io.invertase.firebase.auth.ReactNativeFirebaseAuthPackage;
+
+  // ..
+  protected List<ReactPackage> getPackages() {
+    return Arrays.asList(
+      new MainReactPackage(),
+      new ReactNativeFirebaseAuthPackage(),
+      // ..
+```

docs/auth/ios.md

@@ -5,7 +5,23 @@ description: Manually integrate Authentication into your iOS application.
 
 # iOS Setup
 
-> The following steps are only required if your environment does not have access to React Native
-auto-linking. 
+## Manual iOS Integration via CocoaPods
+
+> The following steps are only required if your environment does not have access to React Native
+auto-linking.
+
+#### Add Analytics Pod
+
+**`ios/Podfile`**:
+```ruby{4}
+// ..
+target 'app' do
+  // ..
+  pod 'RNFBAuth', :path => '../node_modules/@react-native-firebase/auth/ios'
+end
+```
+
+## Manual iOS Integration via Frameworks
+
+*TODO*
 
-## TODO