diff --git a/firebase-auth/api/android/firebase-auth.api b/firebase-auth/api/android/firebase-auth.api
index a5ac17791..d997bf223 100644
--- a/firebase-auth/api/android/firebase-auth.api
+++ b/firebase-auth/api/android/firebase-auth.api
@@ -51,6 +51,14 @@ public final class dev/gitlive/firebase/auth/ActionCodeSettings {
 	public fun toString ()Ljava/lang/String;
 }
 
+public final class dev/gitlive/firebase/auth/AdditionalUserInfo {
+	public fun <init> (Lcom/google/firebase/auth/AdditionalUserInfo;)V
+	public final fun getProfile ()Ljava/util/Map;
+	public final fun getProviderId ()Ljava/lang/String;
+	public final fun getUsername ()Ljava/lang/String;
+	public final fun isNewUser ()Z
+}
+
 public final class dev/gitlive/firebase/auth/AndroidPackageName {
 	public fun <init> (Ljava/lang/String;ZLjava/lang/String;)V
 	public synthetic fun <init> (Ljava/lang/String;ZLjava/lang/String;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
@@ -74,6 +82,9 @@ public class dev/gitlive/firebase/auth/AuthCredential {
 }
 
 public final class dev/gitlive/firebase/auth/AuthResult {
+	public fun <init> (Lcom/google/firebase/auth/AuthResult;)V
+	public final fun getAdditionalUserInfo ()Ldev/gitlive/firebase/auth/AdditionalUserInfo;
+	public final fun getCredential ()Ldev/gitlive/firebase/auth/AuthCredential;
 	public final fun getUser ()Ldev/gitlive/firebase/auth/FirebaseUser;
 }
 
@@ -278,6 +289,7 @@ public final class dev/gitlive/firebase/auth/UserMetaData {
 
 public final class dev/gitlive/firebase/auth/android {
 	public static final fun auth (Ldev/gitlive/firebase/Firebase;Ldev/gitlive/firebase/FirebaseApp;)Ldev/gitlive/firebase/auth/FirebaseAuth;
+	public static final fun getAndroid (Ldev/gitlive/firebase/auth/AdditionalUserInfo;)Lcom/google/firebase/auth/AdditionalUserInfo;
 	public static final fun getAndroid (Ldev/gitlive/firebase/auth/AuthResult;)Lcom/google/firebase/auth/AuthResult;
 	public static final fun getAndroid (Ldev/gitlive/firebase/auth/AuthTokenResult;)Lcom/google/firebase/auth/GetTokenResult;
 	public static final fun getAndroid (Ldev/gitlive/firebase/auth/FirebaseAuth;)Lcom/google/firebase/auth/FirebaseAuth;
diff --git a/firebase-auth/api/jvm/firebase-auth.api b/firebase-auth/api/jvm/firebase-auth.api
index 170ac9afa..f629f1f01 100644
--- a/firebase-auth/api/jvm/firebase-auth.api
+++ b/firebase-auth/api/jvm/firebase-auth.api
@@ -51,6 +51,14 @@ public final class dev/gitlive/firebase/auth/ActionCodeSettings {
 	public fun toString ()Ljava/lang/String;
 }
 
+public final class dev/gitlive/firebase/auth/AdditionalUserInfo {
+	public fun <init> ()V
+	public final fun getProfile ()Ljava/util/Map;
+	public final fun getProviderId ()Ljava/lang/String;
+	public final fun getUsername ()Ljava/lang/String;
+	public final fun isNewUser ()Z
+}
+
 public final class dev/gitlive/firebase/auth/AndroidPackageName {
 	public fun <init> (Ljava/lang/String;ZLjava/lang/String;)V
 	public synthetic fun <init> (Ljava/lang/String;ZLjava/lang/String;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
@@ -74,6 +82,9 @@ public class dev/gitlive/firebase/auth/AuthCredential {
 }
 
 public final class dev/gitlive/firebase/auth/AuthResult {
+	public fun <init> (Lcom/google/firebase/auth/AuthResult;)V
+	public final fun getAdditionalUserInfo ()Ldev/gitlive/firebase/auth/AdditionalUserInfo;
+	public final fun getCredential ()Ldev/gitlive/firebase/auth/AuthCredential;
 	public final fun getUser ()Ldev/gitlive/firebase/auth/FirebaseUser;
 }
 
diff --git a/firebase-auth/src/androidMain/kotlin/dev/gitlive/firebase/auth/auth.kt b/firebase-auth/src/androidMain/kotlin/dev/gitlive/firebase/auth/auth.kt
index fec2e73a0..cc4f2957d 100644
--- a/firebase-auth/src/androidMain/kotlin/dev/gitlive/firebase/auth/auth.kt
+++ b/firebase-auth/src/androidMain/kotlin/dev/gitlive/firebase/auth/auth.kt
@@ -118,9 +118,29 @@ public actual class FirebaseAuth internal constructor(internal val android: com.
 
 public val AuthResult.android: com.google.firebase.auth.AuthResult get() = android
 
-public actual class AuthResult internal constructor(internal val android: com.google.firebase.auth.AuthResult) {
+public actual class AuthResult(internal val android: com.google.firebase.auth.AuthResult) {
     public actual val user: FirebaseUser?
         get() = android.user?.let { FirebaseUser(it) }
+    public actual val credential: AuthCredential?
+        get() = android.credential?.let { AuthCredential(it) }
+    public actual val additionalUserInfo: AdditionalUserInfo?
+        get() = android.additionalUserInfo?.let { AdditionalUserInfo(it) }
+}
+
+public val AdditionalUserInfo.android: com.google.firebase.auth.AdditionalUserInfo
+    get() = android
+
+public actual class AdditionalUserInfo(
+    internal val android: com.google.firebase.auth.AdditionalUserInfo,
+) {
+    public actual val providerId: String?
+        get() = android.providerId
+    public actual val username: String?
+        get() = android.username
+    public actual val profile: Map<String, Any?>?
+        get() = android.profile
+    public actual val isNewUser: Boolean
+        get() = android.isNewUser
 }
 
 public val AuthTokenResult.android: com.google.firebase.auth.GetTokenResult get() = android
diff --git a/firebase-auth/src/commonMain/kotlin/dev/gitlive/firebase/auth/auth.kt b/firebase-auth/src/commonMain/kotlin/dev/gitlive/firebase/auth/auth.kt
index f66ce3c03..2665d2eb8 100644
--- a/firebase-auth/src/commonMain/kotlin/dev/gitlive/firebase/auth/auth.kt
+++ b/firebase-auth/src/commonMain/kotlin/dev/gitlive/firebase/auth/auth.kt
@@ -41,6 +41,15 @@ public expect class FirebaseAuth {
 
 public expect class AuthResult {
     public val user: FirebaseUser?
+    public val credential: AuthCredential?
+    public val additionalUserInfo: AdditionalUserInfo?
+}
+
+public expect class AdditionalUserInfo {
+    public val providerId: String?
+    public val username: String?
+    public val profile: Map<String, Any?>?
+    public val isNewUser: Boolean
 }
 
 public expect class AuthTokenResult {
diff --git a/firebase-auth/src/commonTest/kotlin/dev/gitlive/firebase/auth/auth.kt b/firebase-auth/src/commonTest/kotlin/dev/gitlive/firebase/auth/auth.kt
index 47db21755..96f259176 100644
--- a/firebase-auth/src/commonTest/kotlin/dev/gitlive/firebase/auth/auth.kt
+++ b/firebase-auth/src/commonTest/kotlin/dev/gitlive/firebase/auth/auth.kt
@@ -112,6 +112,22 @@ class FirebaseAuthTest {
         assertEquals(uid, result.user!!.uid)
     }
 
+    @Test
+    fun testAuthResultStructure() = runTest {
+        val uid = getTestUid("test@test.com", "test123")
+        val result = auth.signInWithEmailAndPassword("test@test.com", "test123")
+        assertNotNull(result.user, "User does not exist.")
+        assertEquals(uid, result.user!!.uid, "uid does not match.")
+        assertNull(result.credential, "Credential throws.")
+        // Just test if it does not throw
+        result.additionalUserInfo?.let { additionalUserInfo ->
+            additionalUserInfo.providerId
+            additionalUserInfo.username
+            additionalUserInfo.profile
+            additionalUserInfo.isNewUser
+        }
+    }
+
     @Test
     fun testIsSignInWithEmailLink() {
         val validLink = "http://localhost:9099/emulator/action?mode=signIn&lang=en&oobCode=_vr0QcFcxcVeLZbrcU-GpTaZiuxlHquqdC8MSy0YM_vzWCTAQgV9Jq&apiKey=fake-api-key&continueUrl=https%3A%2F%2Fexample.com%2Fsignin"
diff --git a/firebase-auth/src/iosMain/kotlin/dev/gitlive/firebase/auth/auth.kt b/firebase-auth/src/iosMain/kotlin/dev/gitlive/firebase/auth/auth.kt
index 30cbc9cf0..30ff27bc1 100644
--- a/firebase-auth/src/iosMain/kotlin/dev/gitlive/firebase/auth/auth.kt
+++ b/firebase-auth/src/iosMain/kotlin/dev/gitlive/firebase/auth/auth.kt
@@ -17,6 +17,7 @@ import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.coroutines.flow.Flow
 import platform.Foundation.NSError
+import platform.Foundation.NSString
 import platform.Foundation.NSURL
 
 public val FirebaseAuth.ios: FIRAuth get() = FIRAuth.auth()
@@ -104,11 +105,39 @@ public actual class FirebaseAuth internal constructor(internal val ios: FIRAuth)
 
     public actual fun useEmulator(host: String, port: Int): Unit = ios.useEmulatorWithHost(host, port.toLong())
 }
+
 public val AuthResult.ios: FIRAuthDataResult get() = ios
 
-public actual class AuthResult internal constructor(internal val ios: FIRAuthDataResult) {
+public actual class AuthResult(internal val ios: FIRAuthDataResult) {
     public actual val user: FirebaseUser?
         get() = FirebaseUser(ios.user())
+    public actual val credential: AuthCredential?
+        get() = ios.credential()?.let { AuthCredential(it) }
+    public actual val additionalUserInfo: AdditionalUserInfo?
+        get() = ios.additionalUserInfo()?.let { AdditionalUserInfo(it) }
+}
+
+public val AdditionalUserInfo.ios: FIRAdditionalUserInfo get() = ios
+
+public actual class AdditionalUserInfo(
+    internal val ios: FIRAdditionalUserInfo,
+) {
+    public actual val providerId: String?
+        get() = ios.providerID()
+    public actual val username: String?
+        get() = ios.username()
+    public actual val profile: Map<String, Any?>?
+        get() = ios.profile()
+            ?.mapNotNull { (key, value) ->
+                if (key is NSString && value != null) {
+                    key.toString() to value
+                } else {
+                    null
+                }
+            }
+            ?.toMap()
+    public actual val isNewUser: Boolean
+        get() = ios.newUser()
 }
 
 public val AuthTokenResult.ios: FIRAuthTokenResult get() = ios
diff --git a/firebase-auth/src/jsMain/kotlin/dev/gitlive/firebase/auth/auth.kt b/firebase-auth/src/jsMain/kotlin/dev/gitlive/firebase/auth/auth.kt
index a222d4d6e..4d0223d28 100644
--- a/firebase-auth/src/jsMain/kotlin/dev/gitlive/firebase/auth/auth.kt
+++ b/firebase-auth/src/jsMain/kotlin/dev/gitlive/firebase/auth/auth.kt
@@ -33,8 +33,10 @@ import kotlinx.coroutines.await
 import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.callbackFlow
+import kotlin.js.Json
 import kotlin.js.json
 import dev.gitlive.firebase.auth.externals.AuthResult as JsAuthResult
+import dev.gitlive.firebase.auth.externals.AdditionalUserInfo as JsAdditionalUserInfo
 
 public actual val Firebase.auth: FirebaseAuth
     get() = rethrow { FirebaseAuth(getAuth()) }
@@ -133,9 +135,34 @@ public actual class FirebaseAuth internal constructor(internal val js: Auth) {
 
 public val AuthResult.js: JsAuthResult get() = js
 
-public actual class AuthResult internal constructor(internal val js: JsAuthResult) {
+public actual class AuthResult(internal val js: JsAuthResult) {
     public actual val user: FirebaseUser?
         get() = rethrow { js.user?.let { FirebaseUser(it) } }
+    public actual val credential: AuthCredential?
+        get() = rethrow { js.credential?.let { AuthCredential(it) } }
+    public actual val additionalUserInfo: AdditionalUserInfo?
+        get() = rethrow { js.additionalUserInfo?.let { AdditionalUserInfo(it) } }
+}
+
+public val AdditionalUserInfo.js: JsAdditionalUserInfo get() = js
+
+public actual class AdditionalUserInfo(
+    internal val js: JsAdditionalUserInfo,
+) {
+    public actual val providerId: String?
+        get() = js.providerId
+    public actual val username: String?
+        get() = js.username
+    public actual val profile: Map<String, Any?>?
+        get() = rethrow {
+            val profile = js.profile ?: return@rethrow null
+            val entries = js("Object.entries") as (Json) -> Array<Array<Any?>>
+            return@rethrow entries
+                .invoke(profile)
+                .associate { entry -> entry[0] as String to entry[1] }
+        }
+    public actual val isNewUser: Boolean
+        get() = js.newUser
 }
 
 public val AuthTokenResult.js: IdTokenResult get() = js
diff --git a/firebase-auth/src/jsMain/kotlin/dev/gitlive/firebase/auth/externals/auth.kt b/firebase-auth/src/jsMain/kotlin/dev/gitlive/firebase/auth/externals/auth.kt
index e535e6c22..20c3f14c3 100644
--- a/firebase-auth/src/jsMain/kotlin/dev/gitlive/firebase/auth/externals/auth.kt
+++ b/firebase-auth/src/jsMain/kotlin/dev/gitlive/firebase/auth/externals/auth.kt
@@ -170,6 +170,14 @@ public external interface AuthResult {
     public val credential: AuthCredential?
     public val operationType: String?
     public val user: User?
+    public val additionalUserInfo: AdditionalUserInfo?
+}
+
+public external interface AdditionalUserInfo {
+    public val providerId: String?
+    public val username: String?
+    public val profile: Json?
+    public val newUser: Boolean
 }
 
 public external interface AuthCredential {
diff --git a/firebase-auth/src/jvmMain/kotlin/dev/gitlive/firebase/auth/auth.kt b/firebase-auth/src/jvmMain/kotlin/dev/gitlive/firebase/auth/auth.kt
index 3eda71f6b..21043d4d4 100644
--- a/firebase-auth/src/jvmMain/kotlin/dev/gitlive/firebase/auth/auth.kt
+++ b/firebase-auth/src/jvmMain/kotlin/dev/gitlive/firebase/auth/auth.kt
@@ -18,7 +18,7 @@ import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.coroutines.tasks.await
 
-public actual val Firebase.auth
+public actual val Firebase.auth: FirebaseAuth
     get() = FirebaseAuth(com.google.firebase.auth.FirebaseAuth.getInstance())
 
 public actual fun Firebase.auth(app: FirebaseApp) =
@@ -127,9 +127,24 @@ public actual class FirebaseAuth internal constructor(internal val android: com.
 
 public val AuthResult.android: com.google.firebase.auth.AuthResult get() = android
 
-public actual class AuthResult internal constructor(internal val android: com.google.firebase.auth.AuthResult) {
+public actual class AuthResult(internal val android: com.google.firebase.auth.AuthResult) {
     public actual val user: FirebaseUser?
         get() = android.user?.let { FirebaseUser(it) }
+    public actual val credential: AuthCredential?
+        get() = throw NotImplementedError()
+    public actual val additionalUserInfo: AdditionalUserInfo?
+        get() = throw NotImplementedError()
+}
+
+public actual class AdditionalUserInfo {
+    public actual val providerId: String?
+        get() = throw NotImplementedError()
+    public actual val username: String?
+        get() = throw NotImplementedError()
+    public actual val profile: Map<String, Any?>?
+        get() = throw NotImplementedError()
+    public actual val isNewUser: Boolean
+        get() = throw NotImplementedError()
 }
 
 public val AuthTokenResult.android: com.google.firebase.auth.GetTokenResult get() = android