diff --git a/internal/api/user_handler.go b/internal/api/user_handler.go
index 02f384f..99e3631 100644
--- a/internal/api/user_handler.go
+++ b/internal/api/user_handler.go
@@ -3,6 +3,7 @@ package api
 import (
 	"encoding/json"
 	"errors"
+	"log"
 	"net/http"
 
 	"gitea.mrixs.me/minecraft-platform/backend/internal/core"
@@ -21,8 +22,14 @@ func (h *UserHandler) Register(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// --- ДОБАВЛЕНО ЛОГИРОВАНИЕ ---
+	log.Printf("[Handler] Received registration request for username: '%s', email: '%s'", req.Username, req.Email)
+
 	err := h.Service.RegisterNewUser(r.Context(), req)
 	if err != nil {
+		// --- ДОБАВЛЕНО ЛОГИРОВАНИЕ ОШИБКИ ---
+		log.Printf("[Handler] Service returned error: %v", err)
+
 		switch {
 		case errors.Is(err, database.ErrUserExists):
 			http.Error(w, err.Error(), http.StatusConflict)
@@ -34,5 +41,7 @@ func (h *UserHandler) Register(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// --- ДОБАВЛЕНО ЛОГИРОВАНИЕ УСПЕХА ---
+	log.Printf("[Handler] User '%s' registered successfully.", req.Username)
 	w.WriteHeader(http.StatusCreated)
 }
diff --git a/internal/database/user_repository.go b/internal/database/user_repository.go
index 1e85304..f2bf4b9 100644
--- a/internal/database/user_repository.go
+++ b/internal/database/user_repository.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"errors"
+	"log"
 
 	"gitea.mrixs.me/minecraft-platform/backend/internal/models"
 	"github.com/google/uuid"
@@ -21,33 +22,47 @@ type UserRepository struct {
 
 // CreateUserTx создает нового пользователя и его профиль в рамках одной транзакции
 func (r *UserRepository) CreateUserTx(ctx context.Context, user *models.User) error {
+	log.Println("[DB] Beginning CreateUserTx transaction")
 	tx, err := r.DB.Begin(ctx)
 	if err != nil {
+		log.Printf("[DB] ERROR: Failed to begin transaction: %v", err)
 		return err
 	}
 	defer tx.Rollback(ctx)
 
+	log.Println("[DB] Checking if user exists...")
 	var exists bool
 	err = tx.QueryRow(ctx,
-		"SELECT EXISTS(SELECT 1 FROM users WHERE username = $1 OR email = $2)").Scan(&exists)
+		"SELECT EXISTS(SELECT 1 FROM users WHERE username = $1 OR email = $2)", user.Username, user.Email).Scan(&exists)
 	if err != nil {
+		log.Printf("[DB] ERROR: User existence check failed: %v", err)
 		return err
 	}
 	if exists {
+		log.Printf("[DB] User with username '%s' or email '%s' already exists.", user.Username, user.Email)
 		return ErrUserExists
 	}
+	log.Println("[DB] User does not exist, proceeding.")
 
+	log.Println("[DB] Inserting into 'users' table...")
 	var newUserID int
-	err = tx.QueryRow(ctx, "INSERT INTO users (uuid, username, email, password_hash, role) VALUES ($1, $2, $3, $4, $5) RETURNING id").Scan(&newUserID)
+	err = tx.QueryRow(ctx, "INSERT INTO users (uuid, username, email, password_hash, role) VALUES ($1, $2, $3, $4, $5) RETURNING id",
+		user.UUID, user.Username, user.Email, user.PasswordHash, user.Role).Scan(&newUserID)
 	if err != nil {
+		log.Printf("[DB] ERROR: Insert into 'users' failed: %v", err)
 		return err
 	}
+	log.Printf("[DB] Inserted into 'users' table successfully. New user ID: %d", newUserID)
 
-	_, err = tx.Exec(ctx, "INSERT INTO profiles (user_id) VALUES ($1)")
+	log.Println("[DB] Inserting into 'profiles' table...")
+	_, err = tx.Exec(ctx, "INSERT INTO profiles (user_id) VALUES ($1)", newUserID)
 	if err != nil {
+		log.Printf("[DB] ERROR: Insert into 'profiles' failed: %v", err)
 		return err
 	}
+	log.Println("[DB] Inserted into 'profiles' table successfully.")
 
+	log.Println("[DB] Committing transaction...")
 	return tx.Commit(ctx)
 }
 
@@ -122,8 +137,6 @@ var (
 )
 
 // ValidateAccessToken проверяет, действителен ли токен для данного пользователя.
-// В нашей реализации мы просто проверяем его существование.
-// В более сложных системах здесь можно было бы проверять срок действия токена.
 func (r *UserRepository) ValidateAccessToken(ctx context.Context, token string, userUUID uuid.UUID) error {
 	var exists bool
 	query := `