For PMD and copyright.

address/src/main/java/com/alibaba/nacos/address/auth/AddressServerAuthManager.java

@@ -28,6 +28,7 @@ import com.alibaba.nacos.auth.model.Permission;
  *
  * @author xiweng.yy
  */
+@SuppressWarnings("PMD.ServiceOrDaoClassShouldEndWithImplRule")
 public class AddressServerAuthManager implements AuthService {
     
     @Override

auth/src/main/java/com/alibaba/nacos/auth/persist/UserPersistService.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 1999-2021 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.nacos.auth.persist;
 
 import com.alibaba.nacos.auth.model.Page;

auth/src/main/java/com/alibaba/nacos/auth/persist/repository/embedded/AuthEmbeddedStoragePersistServiceImpl.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 1999-2021 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.nacos.auth.persist.repository.embedded;
 
 import com.alibaba.nacos.auth.configuration.ConditionOnEmbeddedStorage;

auth/src/main/resources/META-INF/services/com.alibaba.nacos.auth.AuthService

@@ -1 +1,17 @@
-com.alibaba.nacos.auth.NacosAuthServiceImpl
+#
+# Copyright 1999-2021 Alibaba Group Holding Ltd.
+#
+# 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.
+#
+
+com.alibaba.nacos.auth.NacosAuthServiceImpl

client/src/main/java/com/alibaba/nacos/client/auth/LoginIdentityContext.java

@@ -20,6 +20,11 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 
+/**
+ * Login identity context.
+ *
+ * @author Nacos
+ */
 public class LoginIdentityContext {
     
     /**

client/src/main/java/com/alibaba/nacos/client/auth/impl/NacosAuthLoginConstant.java

@@ -16,6 +16,11 @@
 
 package com.alibaba.nacos.client.auth.impl;
 
+/**
+ * Nacos auth login constants.
+ *
+ * @author Nacos
+ */
 public class NacosAuthLoginConstant {
     
     public static final String ACCESSTOKEN = "accessToken";

client/src/main/java/com/alibaba/nacos/client/auth/impl/process/HttpLoginProcessor.java

@@ -38,6 +38,11 @@ import java.util.Properties;
 import static com.alibaba.nacos.client.naming.utils.UtilAndComs.HTTP;
 import static com.alibaba.nacos.client.naming.utils.UtilAndComs.webContext;
 
+/**
+ * Login processor for Http.
+ *
+ * @author Nacos
+ */
 public class HttpLoginProcessor implements LoginProcessor {
     
     private static final Logger SECURITY_LOGGER = LoggerFactory.getLogger(HttpLoginProcessor.class);

client/src/main/java/com/alibaba/nacos/client/auth/impl/process/LoginProcessor.java

@@ -19,6 +19,11 @@ package com.alibaba.nacos.client.auth.impl.process;
 import com.alibaba.nacos.client.auth.LoginIdentityContext;
 import java.util.Properties;
 
+/**
+ * Nacos login processor.
+ *
+ * @author Nacos
+ */
 public interface LoginProcessor {
     /**
      * send request to server and get result.

client/src/main/java/com/alibaba/nacos/client/auth/spi/AbstractClientAuthService.java

@@ -20,6 +20,11 @@ import com.alibaba.nacos.common.http.client.NacosRestTemplate;
 
 import java.util.List;
 
+/**
+ * Client auth services SPI.
+ *
+ * @author Nacos
+ */
 public abstract class AbstractClientAuthService implements ClientAuthService {
     
     protected List<String> serverList;

client/src/main/java/com/alibaba/nacos/client/security/SecurityProxy.java

@@ -70,7 +70,7 @@ public class SecurityProxy implements Closeable {
      * @return a combination of all context.
      */
     public Map<String, String> getIdentityContext(RequestResource resource) {
-        Map<String, String> header = new HashMap<>();
+        Map<String, String> header = new HashMap<>(1);
         for (ClientAuthService clientAuthService : clientAuthPluginManager.getAuthServiceSpiImplSet()) {
             LoginIdentityContext loginIdentityContext = clientAuthService.getLoginIdentityContext(resource);
             for (String key : loginIdentityContext.getAllKey()) {