add user dto and mapper, add anotations to auto-generate getters and setters with lombok

pom.xml

@@ -44,7 +44,13 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
-	</dependencies>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.30</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
 
 	<build>
 		<plugins>

src/main/java/com/cloudcomputing/todo/dto/UserDTO.java

+package com.cloudcomputing.todo.dto;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class UserDTO {
+    private Long userId;
+    private String userName;
+    private String password;
+}

src/main/java/com/cloudcomputing/todo/entity/User.java

 package com.cloudcomputing.todo.entity;
 
+import lombok.Getter;
+import lombok.Setter;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.mongodb.core.mapping.Document;
 
+@Getter
+@Setter
 @Document(collection = "users")
 public class User {
     @Id
-    private Long user_id;
-    private String user_name;
-    private String password;
+    private Long userId;
+    private String userName;
+    private String passwordHash;
 }

src/main/java/com/cloudcomputing/todo/mapper/UserMapper.java

+package com.cloudcomputing.todo.mapper;
+
+import com.cloudcomputing.todo.dto.UserDTO;
+import com.cloudcomputing.todo.entity.User;
+
+public class UserMapper {
+    public UserDTO entityToDto(User user) {
+        UserDTO userDTO = new UserDTO();
+        userDTO.setUserId(user.getUserId());
+        userDTO.setUserName(user.getUserName());
+
+        return userDTO;
+    }
+
+    public User dtoToEntity(UserDTO userDTO) {
+        User user = new User();
+        user.setUserId(userDTO.getUserId());
+        user.setUserName(userDTO.getUserName());
+        //TODO: create userservice class, implement hashing algorithm, create hash from dto password
+        user.setPasswordHash("placeholder");
+        return user;
+    }
+}