diff --git a/src/main/java/ru/yandex/practicum/catsgram/CatsgramApplication.java b/develop/src/main/java/ru/yandex/practicum/catsgram/CatsgramApplication.java
similarity index 99%
rename from src/main/java/ru/yandex/practicum/catsgram/CatsgramApplication.java
rename to develop/src/main/java/ru/yandex/practicum/catsgram/CatsgramApplication.java
index 63f822d5..c789fb59 100644
--- a/src/main/java/ru/yandex/practicum/catsgram/CatsgramApplication.java
+++ b/develop/src/main/java/ru/yandex/practicum/catsgram/CatsgramApplication.java
@@ -9,5 +9,4 @@ public class CatsgramApplication {
 	public static void main(String[] args) {
 		SpringApplication.run(CatsgramApplication.class, args);
 	}
-
 }
diff --git a/src/main/java/ru/yandex/practicum/catsgram/controller/PostController.java b/develop/src/main/java/ru/yandex/practicum/catsgram/controller/PostController.java
similarity index 69%
rename from src/main/java/ru/yandex/practicum/catsgram/controller/PostController.java
rename to develop/src/main/java/ru/yandex/practicum/catsgram/controller/PostController.java
index 2b19e51d..d6e9ddc7 100644
--- a/src/main/java/ru/yandex/practicum/catsgram/controller/PostController.java
+++ b/develop/src/main/java/ru/yandex/practicum/catsgram/controller/PostController.java
@@ -1,20 +1,23 @@
 package ru.yandex.practicum.catsgram.controller;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RestController;
-import ru.yandex.practicum.catsgram.model.Post;
+import ru.yandex.practicum.catsgram.models.Post;
 import java.util.ArrayList;
 import java.util.List;
 
 @RestController
 public class PostController {
-
+    private static final Logger log = LoggerFactory.getLogger(PostController.class);
     private final List<Post> posts = new ArrayList<>();
 
     @GetMapping("/posts")
     public List<Post> findAll() {
+        log.debug("Текущее количество постов: {}", posts.size());
         return posts;
     }
 
diff --git a/src/main/java/ru/yandex/practicum/catsgram/controller/SimpleController.java b/develop/src/main/java/ru/yandex/practicum/catsgram/controller/SimpleController.java
similarity index 100%
rename from src/main/java/ru/yandex/practicum/catsgram/controller/SimpleController.java
rename to develop/src/main/java/ru/yandex/practicum/catsgram/controller/SimpleController.java
diff --git a/develop/src/main/java/ru/yandex/practicum/catsgram/controller/UserController.java b/develop/src/main/java/ru/yandex/practicum/catsgram/controller/UserController.java
new file mode 100644
index 00000000..94d7aa0f
--- /dev/null
+++ b/develop/src/main/java/ru/yandex/practicum/catsgram/controller/UserController.java
@@ -0,0 +1,43 @@
+package ru.yandex.practicum.catsgram.controller;
+
+import org.springframework.web.bind.annotation.*;
+import ru.yandex.practicum.catsgram.models.User;
+import ru.yandex.practicum.catsgram.exception.InvalidEmailException;
+import ru.yandex.practicum.catsgram.exception.UserAlreadyExistException;
+
+import java.util.*;
+
+@RestController
+@RequestMapping("/users")
+public class UserController {
+    private final Map<String, User> users = new HashMap<>();
+
+    @GetMapping
+    public Collection<User> findAll() {
+        return users.values();
+    }
+
+    @PostMapping
+    public User create(@RequestBody User user) {
+        if(user.getEmail() == null || user.getEmail().isBlank()) {
+            throw new InvalidEmailException("Адрес электронной почты не может быть пустым.");
+        }
+        if(users.containsKey(user.getEmail())) {
+            throw new UserAlreadyExistException("Пользователь с электронной почтой " +
+                    user.getEmail() + " уже зарегистрирован.");
+        }
+        users.put(user.getEmail(), user);
+        return user;
+    }
+
+    @PutMapping
+    public User put(@RequestBody User user) {
+        if(user.getEmail() == null || user.getEmail().isBlank()) {
+            throw new InvalidEmailException("Адрес электронной почты не может быть пустым.");
+        }
+        users.put(user.getEmail(), user);
+
+        return user;
+    }
+}
+
diff --git a/develop/src/main/java/ru/yandex/practicum/catsgram/exception/InvalidEmailException.java b/develop/src/main/java/ru/yandex/practicum/catsgram/exception/InvalidEmailException.java
new file mode 100644
index 00000000..47fd862b
--- /dev/null
+++ b/develop/src/main/java/ru/yandex/practicum/catsgram/exception/InvalidEmailException.java
@@ -0,0 +1,7 @@
+package ru.yandex.practicum.catsgram.exception;
+
+public class InvalidEmailException extends RuntimeException {
+    public InvalidEmailException(String s) {
+        super(s);
+    }
+}
\ No newline at end of file
diff --git a/develop/src/main/java/ru/yandex/practicum/catsgram/exception/UserAlreadyExistException.java b/develop/src/main/java/ru/yandex/practicum/catsgram/exception/UserAlreadyExistException.java
new file mode 100644
index 00000000..b3681b26
--- /dev/null
+++ b/develop/src/main/java/ru/yandex/practicum/catsgram/exception/UserAlreadyExistException.java
@@ -0,0 +1,7 @@
+package ru.yandex.practicum.catsgram.exception;
+
+public class UserAlreadyExistException extends RuntimeException {
+    public UserAlreadyExistException(String s) {
+        super(s);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/ru/yandex/practicum/catsgram/model/Post.java b/develop/src/main/java/ru/yandex/practicum/catsgram/models/Post.java
similarity index 95%
rename from src/main/java/ru/yandex/practicum/catsgram/model/Post.java
rename to develop/src/main/java/ru/yandex/practicum/catsgram/models/Post.java
index 6a4b8868..7d18f1d1 100644
--- a/src/main/java/ru/yandex/practicum/catsgram/model/Post.java
+++ b/develop/src/main/java/ru/yandex/practicum/catsgram/models/Post.java
@@ -1,4 +1,4 @@
-package ru.yandex.practicum.catsgram.model;
+package ru.yandex.practicum.catsgram.models;
 
 import java.time.Instant;
 
diff --git a/develop/src/main/java/ru/yandex/practicum/catsgram/models/User.java b/develop/src/main/java/ru/yandex/practicum/catsgram/models/User.java
new file mode 100644
index 00000000..1352b4d5
--- /dev/null
+++ b/develop/src/main/java/ru/yandex/practicum/catsgram/models/User.java
@@ -0,0 +1,47 @@
+package ru.yandex.practicum.catsgram.models;
+
+import java.time.LocalDate;
+import java.util.Objects;
+
+public class User {
+    private String email;
+    private String nickname;
+    private LocalDate birthdate;
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getNickname() {
+        return nickname;
+    }
+
+    public void setNickname(String nickname) {
+        this.nickname = nickname;
+    }
+
+    public LocalDate getBirthdate() {
+        return birthdate;
+    }
+
+    public void setBirthdate(LocalDate birthdate) {
+        this.birthdate = birthdate;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        User user = (User) o;
+        return email.equals(user.email);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(email);
+    }
+}
\ No newline at end of file
diff --git a/develop/src/main/resources/application.properties b/develop/src/main/resources/application.properties
new file mode 100644
index 00000000..235f65ce
--- /dev/null
+++ b/develop/src/main/resources/application.properties
@@ -0,0 +1,2 @@
+logging.level.org.zalando.logbook=TRACE
+logging.level.ru.yandex.practicum.contollers=debug
diff --git a/src/test/java/ru/yandex/practicum/catsgram/CatsgramApplicationTests.java b/develop/src/test/java/ru/yandex/practicum/catsgram/CatsgramApplicationTests.java
similarity index 79%
rename from src/test/java/ru/yandex/practicum/catsgram/CatsgramApplicationTests.java
rename to develop/src/test/java/ru/yandex/practicum/catsgram/CatsgramApplicationTests.java
index 32936573..c01905c9 100644
--- a/src/test/java/ru/yandex/practicum/catsgram/CatsgramApplicationTests.java
+++ b/develop/src/test/java/ru/yandex/practicum/catsgram/CatsgramApplicationTests.java
@@ -1,4 +1,4 @@
-package test.java.ru.yandex.practicum.catsgram;
+package ru.yandex.practicum.catsgram;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
diff --git a/pom.xml b/pom.xml
index a4bdb80c..43c441d0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.6.1</version>
+		<version>2.6.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>ru.yandex.practicum</groupId>
@@ -22,11 +22,33 @@
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-logging</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.zalando</groupId>
+			<artifactId>logbook-spring-boot-starter</artifactId>
+			<version>2.14.0</version>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.testng</groupId>
+			<artifactId>testng</artifactId>
+			<version>RELEASE</version>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-api</artifactId>
+			<version>5.8.1</version>
+			<scope>compile</scope>
+		</dependency>
 	</dependencies>
 
 	<build>
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
deleted file mode 100644
index 8b137891..00000000
--- a/src/main/resources/application.properties
+++ /dev/null
@@ -1 +0,0 @@
-