update

android/app/build.gradle

@@ -2,6 +2,8 @@ plugins {
     id "com.android.application"
     id "kotlin-android"
     id "dev.flutter.flutter-gradle-plugin"
+    id "com.google.gms.google-services"
+    id "com.google.firebase.crashlytics"
 }
 
 def localProperties = new Properties()
@@ -45,7 +47,7 @@ android {
         applicationId "com.appscale.pos"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdkVersion 21
+        minSdkVersion 23
         targetSdkVersion 35
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
@@ -69,4 +71,6 @@ dependencies {
     //multiDex
     implementation 'com.android.support:multidex:1.0.3'
     implementation 'androidx.multidex:multidex:2.0.1'
+    implementation platform('com.google.firebase:firebase-bom:34.2.0')
+    implementation 'com.google.firebase:firebase-crashlytics'
 }

android/app/google-services.json

@@ -0,0 +1,29 @@
+{
+  "project_info": {
+    "project_number": "1094037575589",
+    "project_id": "apskel-pos",
+    "storage_bucket": "apskel-pos.firebasestorage.app"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:1094037575589:android:5157684038a971a3d3fa4c",
+        "android_client_info": {
+          "package_name": "com.appscale.pos"
+        }
+      },
+      "oauth_client": [],
+      "api_key": [
+        {
+          "current_key": "AIzaSyAle1ZcO4Z7wtNJUHkHEVkuBHr6mHcvPvI"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": []
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}