新增：新增用户登录和退出 API（引入 Sa-Token 依赖，详情可见 README 介绍）

continew-admin-common/src/main/java/top/charles7c/cnadmin/common/model/entity/BaseEntity.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2022-present Charles7c Authors. 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 top.charles7c.cnadmin.common.model.entity;
+
+import java.io.Serializable;
+import java.util.Date;
+
+import lombok.Data;
+
+/**
+ * 实体类基类
+ *
+ * @author Charles7c
+ * @since 2022/12/12 23:02
+ */
+@Data
+public class BaseEntity implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * 创建人
+     */
+    private Long createUser;
+
+    /**
+     * 创建时间
+     */
+    private Date createTime;
+
+    /**
+     * 修改人
+     */
+    private Long updateUser;
+
+    /**
+     * 修改时间
+     */
+    private Date updateTime;
+}