feat(google-auth): add credentialManagerMode for customizable sign-in behaviour

android/src/main/java/com/googleauth/GoogleAuthModule.kt

@@ -46,6 +46,7 @@ class GoogleAuthModule(reactContext: ReactApplicationContext) :
   private var androidClientId: String? = null
   private var hostedDomain: String? = null
   private var configuredScopes: List<String>? = null
+  private var credentialManagerMode: String = "auto" // 'silent', 'interactive', or 'auto'
   private var isConfigured = false
   private val coroutineScope = CoroutineScope(Dispatchers.Main)
 
@@ -125,7 +126,16 @@ class GoogleAuthModule(reactContext: ReactApplicationContext) :
       webClientId = params.getString("webClientId")
       androidClientId = params.getString("androidClientId")
       hostedDomain = params.getString("hostedDomain")
-
+
+      // Extract credential manager mode (default to "auto" if not specified)
+      credentialManagerMode = params.getString("credentialManagerMode") ?: "auto"
+
+      // Validate credential manager mode
+      if (credentialManagerMode !in listOf("silent", "interactive", "auto")) {
+        promise.reject("INVALID_CONFIG", "credentialManagerMode must be 'silent', 'interactive', or 'auto'")
+        return
+      }
+
       // Extract and validate scopes
       val scopesArray = params.getArray("scopes")
       configuredScopes = scopesArray?.let { array ->
@@ -192,18 +202,43 @@ class GoogleAuthModule(reactContext: ReactApplicationContext) :
           return@launch
         }
 
-        // Try silent sign-in first
-        try {
-          val silentResult = performSilentSignIn(activity)
-          withContext(Dispatchers.Main) {
-            promise.resolve(silentResult)
+        when (credentialManagerMode) {
+          "silent" -> {
+            // Silent mode only - no fallback to interactive
+            try {
+              val silentResult = performSilentSignIn(activity)
+              withContext(Dispatchers.Main) {
+                promise.resolve(silentResult)
+              }
+            } catch (e: Exception) {
+              Log.e("GoogleAuth", "Silent sign-in failed: " + (e.localizedMessage ?: "Unknown error"))
+              withContext(Dispatchers.Main) {
+                promise.reject("SIGN_IN_ERROR", "Silent sign-in failed. No saved credentials found or user not previously authorized: " + (e.localizedMessage ?: "Unknown error"), e)
+              }
+            }
+          }
+          "interactive" -> {
+            // Interactive mode only - always show account picker
+            val interactiveResult = performInteractiveSignIn(activity)
+            withContext(Dispatchers.Main) {
+              promise.resolve(interactiveResult)
+            }
           }
-        } catch (e: Exception) {
-          Log.d("GoogleAuth", "Silent sign-in failed, trying interactive: " + (e.localizedMessage ?: "Unknown error"))
-          // If silent fails, try interactive
-          val interactiveResult = performInteractiveSignIn(activity)
-          withContext(Dispatchers.Main) {
-            promise.resolve(interactiveResult)
+          else -> {
+            // Auto mode (default) - try silent first, fallback to interactive
+            try {
+              val silentResult = performSilentSignIn(activity)
+              withContext(Dispatchers.Main) {
+                promise.resolve(silentResult)
+              }
+            } catch (e: Exception) {
+              Log.d("GoogleAuth", "Silent sign-in failed, trying interactive: " + (e.localizedMessage ?: "Unknown error"))
+              // If silent fails, try interactive
+              val interactiveResult = performInteractiveSignIn(activity)
+              withContext(Dispatchers.Main) {
+                promise.resolve(interactiveResult)
+              }
+            }
           }
         }
       } catch (e: Exception) {

example/ios/Podfile.lock

@@ -11,7 +11,7 @@ PODS:
   - FBLazyVector (0.81.0)
   - fmt (11.0.2)
   - glog (0.3.5)
-  - GoogleAuth (2.1.0):
+  - GoogleAuth (1.2.1):
     - boost
     - DoubleConversion
     - fast_float
@@ -2598,7 +2598,7 @@ SPEC CHECKSUMS:
   FBLazyVector: a867936a67af0d09c37935a1b900a1a3c795b6d1
   fmt: a40bb5bd0294ea969aaaba240a927bd33d878cdd
   glog: 5683914934d5b6e4240e497e0f4a3b42d1854183
-  GoogleAuth: d45f30ae4d49edbaf5e48d56586e164b925bf004
+  GoogleAuth: eec941506f196ee17b5e9a74a3b83e720d599232
   GoogleSignIn: d4281ab6cf21542b1cfaff85c191f230b399d2db
   GTMAppAuth: f69bd07d68cd3b766125f7e072c45d7340dea0de
   GTMSessionFetcher: 5aea5ba6bd522a239e236100971f10cb71b96ab6
@@ -2665,7 +2665,7 @@ SPEC CHECKSUMS:
   React-timing: 25e8229ad1cf6874e9f0711515213cb2bc322215
   React-utils: 068cec677032ba78ca0700f2dcbe6d08a0939647
   ReactAppDependencyProvider: c91900fa724baee992f01c05eeb4c9e01a807f78
-  ReactCodegen: 5695f203204e30acbf7d6c06dbb8d0f391e52133
+  ReactCodegen: a55799cae416c387aeaae3aabc1bc0289ac19cee
   ReactCommon: 116d6ee71679243698620d8cd9a9042541e44aa6
   SocketRocket: d4aabe649be1e368d1318fdf28a022d714d65748
   Yoga: 00013dd9cde63a2d98e8002fcc4f5ddb66c10782

src/NativeGoogleAuth.ts

@@ -118,6 +118,16 @@ export interface ConfigureParams {
    * @platform iOS
    */
   forceAccountPicker?: boolean;
+
+  /**
+   * Android Credential Manager behavior mode
+   * - 'silent': Only show existing authorized accounts, no UI interaction
+   * - 'interactive': Always display the Google account picker UI
+   * - 'auto': Try silent sign-in first, fallback to interactive if needed (default)
+   * Default: 'auto'
+   * @platform Android
+   */
+  credentialManagerMode?: 'silent' | 'interactive' | 'auto';
 }
 
 export interface User {