Add auth bulk get/delete snippets

.gitignore

@@ -8,3 +8,7 @@ build/
 *.ear
 *.aar
 *.iml
+
+.project
+.classpath
+.settings

admin/build.gradle

@@ -15,5 +15,5 @@ repositories {
 
 dependencies {
     // Firebase Admin Java SDK
-    compile 'com.google.firebase:firebase-admin:6.12.2'
+    compile 'com.google.firebase:firebase-admin:6.13.0'
 }

admin/src/main/java/com/google/firebase/example/FirebaseAuthSnippets.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2020 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.firebase.example;
+
+import com.google.firebase.auth.DeleteUsersResult;
+import com.google.firebase.auth.EmailIdentifier;
+import com.google.firebase.auth.ErrorInfo;
+import com.google.firebase.auth.FirebaseAuth;
+import com.google.firebase.auth.GetUsersResult;
+import com.google.firebase.auth.PhoneIdentifier;
+import com.google.firebase.auth.ProviderIdentifier;
+import com.google.firebase.auth.UidIdentifier;
+import com.google.firebase.auth.UserIdentifier;
+import com.google.firebase.auth.UserRecord;
+import java.util.Arrays;
+
+public class FirebaseAuthSnippets {
+
+  public static void bulkGetUsers() throws Exception {
+    // [START bulk_get_users]
+    GetUsersResult result = FirebaseAuth.getInstance().getUsersAsync(Arrays.asList(
+        new UidIdentifier("uid1"),
+        new EmailIdentifier("[email protected]"),
+        new PhoneIdentifier("+15555550003"),
+        new ProviderIdentifier("google.com", "google_uid4"))).get();
+
+    System.out.println("Successfully fetched user data:");
+    for (UserRecord user : result.getUsers()) {
+      System.out.println(user.getUid());
+    }
+
+    System.out.println("Unable to find users corresponding to these identifiers:");
+    for (UserIdentifier uid : result.getNotFound()) {
+      System.out.println(uid);
+    }
+    // [END bulk_get_users]
+  }
+
+  public static void bulkDeleteUsers() throws Exception {
+    // [START bulk_delete_users]
+    DeleteUsersResult result = FirebaseAuth.getInstance().deleteUsersAsync(
+        Arrays.asList("uid1", "uid2", "uid3")).get();
+
+    System.out.println("Successfully deleted " + result.getSuccessCount() + " users");
+    System.out.println("Failed to delete " + result.getFailureCount() + " users");
+    for (ErrorInfo error : result.getErrors()) {
+      System.out.println("error #" + error.getIndex() + ", reason: " + error.getReason());
+    }
+    // [END bulk_delete_users]
+  }
+}