diff --git a/back/config/config.go b/back/config/config.go
index 52d510b..b631b81 100644
--- a/back/config/config.go
+++ b/back/config/config.go
@@ -19,6 +19,8 @@ type Config_t struct {
 	PostgresHost          string `env:"POSTGRES_HOST"`
 	PostgresPort          string `env:"POSTGRES_PORT"`
 
+	ISDebugMode string `env:"IS_DEBUG_MODE"`
+
 	ServerPort string
 }
 
diff --git a/back/domain/payment.go b/back/domain/payment.go
index 7ba8d3b..46007cb 100644
--- a/back/domain/payment.go
+++ b/back/domain/payment.go
@@ -27,7 +27,7 @@ func (d *dbImpl) GetPayment(id string) (Payment, error) {
 // GetPaymentsByMoneyPoolID retrieves all payments associated with a specific money pool.
 func (d *dbImpl) GetPaymentsByMoneyPoolID(moneyPoolID string) ([]Payment, error) {
 	var payments []Payment
-	query := `SELECT id, money_pool_id, date, title, amount, description, is_planned, store_id FROM payment WHERE money_pool_id = $1`
+	query := `SELECT id, money_pool_id, date, title, amount, description, is_planned, store_id FROM payment WHERE money_pool_id = $1 ORDER BY date DESC`
 	err := d.db.Select(&payments, query, moneyPoolID)
 	if err != nil {
 		return nil, fmt.Errorf("error fetching payments: %v", err)
diff --git a/back/handler/handler.go b/back/handler/handler.go
index 69cd1a1..cbd0073 100644
--- a/back/handler/handler.go
+++ b/back/handler/handler.go
@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"github.com/gin-gonic/gin"
+	"github.com/walnuts1018/openchokin/back/config"
 	"github.com/walnuts1018/openchokin/back/usecase"
 )
 
@@ -12,9 +13,19 @@ var (
 	uc *usecase.Usecase
 )
 
+func UserMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Set("userID", "1")
+		c.Next()
+	}
+}
 func NewHandler(usecase *usecase.Usecase) (*gin.Engine, error) {
 	uc = usecase
 	r := gin.Default()
+	if config.Config.ISDebugMode == "true" {
+		r.Use(UserMiddleware())
+	}
+
 	v1 := r.Group("/v1")
 	{
 		// クエリパラメータtype=summary or detailでサマリーと詳細を分けられる。
diff --git a/back/infra/psql/init.sql b/back/infra/psql/init.sql
index 464ce4e..858d324 100644
--- a/back/infra/psql/init.sql
+++ b/back/infra/psql/init.sql
@@ -108,3 +108,67 @@ CREATE TABLE IF NOT EXISTS restricted_publication_scope (
 ALTER TABLE restricted_publication_scope 
 ADD CONSTRAINT fk_money_pool_restricted
 CHECK ((SELECT type FROM money_pool WHERE id = pool_id) = 'restricted');
+
+-- 初期データ追加
+-- usersテーブルにデータを挿入
+INSERT INTO users (id) VALUES (DEFAULT), (DEFAULT), (DEFAULT);
+
+-- user_groupsテーブルにデータを挿入
+INSERT INTO user_groups (name, creator_id) VALUES
+('Developers Group', 1),
+('Designers Group', 1),
+('Managers Group', 2);
+
+-- money_poolテーブルにデータを挿入
+INSERT INTO money_pool (name, description, type, owner_id) VALUES
+('Fund for Emergencies', 'Emergency funds for unexpected expenses', 'private', 1),
+('Office Party Fund', 'Savings for annual office parties', 'public', 2),
+('Project X Budget', 'Budget allocated for Project X', 'restricted', 3);
+
+-- money_providerテーブルにデータを挿入
+INSERT INTO money_provider (name, creator_id, balance) VALUES
+('John’s Wallet', 1, 1000.0000),
+('Anna’s Savings', 2, 1500.0000),
+('Company Petty Cash', 3, 500.0000);
+
+-- storeテーブルにデータを挿入
+INSERT INTO store (name, creator_id) VALUES
+('Tech Gadgets', 1),
+('Office Supplies Store', 2),
+('Bookstore', 3);
+
+-- itemテーブルにデータを挿入
+INSERT INTO item (name, creator_id) VALUES
+('Laptop', 1),
+('Ergonomic Keyboard', 1),
+('Planner Notebook', 2);
+
+-- labelテーブルにデータを挿入
+INSERT INTO label (name, creator_id) VALUES
+('Electronics', 1),
+('Office Equipment', 1),
+('Stationery', 2);
+
+-- paymentテーブルにデータを挿入
+INSERT INTO payment (money_pool_id, date, title, amount, description, is_planned, store_id) VALUES
+(1, '2023-01-15', 'Emergency Repair', 200.0000, 'Repairing office printer', TRUE, NULL),
+(2, '2023-02-20', 'Office Party', 300.0000, 'Annual office party expenses', FALSE, NULL),
+(3, '2023-03-12', 'Project X Software', 400.0000, 'Software purchase for Project X', TRUE, 1);
+
+-- item_paymentテーブルにデータを挿入
+INSERT INTO item_payment (payment_id, item_id, quantity) VALUES
+(1, 1, 1),
+(2, 2, 2),
+(3, 3, 3);
+
+-- user_group_membershipテーブルにデータを挿入
+INSERT INTO user_group_membership (group_id, user_id) VALUES
+(1, 1),
+(1, 2),
+(2, 3);
+
+-- restricted_publication_scopeテーブルにデータを挿入
+INSERT INTO restricted_publication_scope (pool_id, group_id) VALUES
+(3, 1),
+(3, 2),
+(3, 3);
diff --git a/back/infra/psql/psql.go b/back/infra/psql/psql.go
index 6af1d0c..673e3b2 100644
--- a/back/infra/psql/psql.go
+++ b/back/infra/psql/psql.go
@@ -17,12 +17,31 @@ const (
 )
 
 func dbInit() error {
-	db, err := sqlx.Open("postgres", fmt.Sprintf("host=%v port=%v user=%v password=%v sslmode=%v", config.Config.PostgresHost, config.Config.PostgresPort, config.Config.PostgresAdminUser, config.Config.PostgresAdminPassword, sslmode))
+	db, err := sqlx.Open("postgres", fmt.Sprintf("host=%v port=%v user=%v password=%v sslmode=%v",
+		config.Config.PostgresHost, config.Config.PostgresPort, config.Config.PostgresAdminUser, config.Config.PostgresAdminPassword, sslmode))
 	if err != nil {
 		return fmt.Errorf("failed to open db: %w", err)
 	}
 	defer db.Close()
 
+	// Check if the user exists
+	var roleName string
+	err = db.Get(&roleName, "SELECT rolname FROM pg_roles WHERE rolname = $1", config.Config.PostgresUser)
+	if err != nil && err != sql.ErrNoRows {
+		return fmt.Errorf("error checking for user existence: %w", err)
+	}
+
+	// If the user does not exist, create it
+	if roleName == "" {
+		// Create a new user with a password
+		_, err = db.Exec(fmt.Sprintf("CREATE USER %v WITH PASSWORD '%v'",
+			config.Config.PostgresUser, config.Config.PostgresPassword))
+		if err != nil {
+			return fmt.Errorf("failed to create user: %w", err)
+		}
+	}
+
+	// Check if the database exists
 	var dbName string
 	err = db.Get(&dbName, "SELECT datname FROM pg_database WHERE datname = $1", config.Config.PostgresDb)
 	if err != nil && err != sql.ErrNoRows {
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 742b565..64a5c28 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -20,6 +20,7 @@ services:
       POSTGRES_DB: chokindb
       POSTGRES_HOST: openchokin-db
       POSTGRES_PORT: 5432
+      IS_DEBUG_MODE: true
     volumes:
       - type: bind
         source: "./back"