Update API

modules/auth/models/user.go

@@ -0,0 +1,12 @@
+package models
+
+import "time"
+
+type User struct {
+	ID           uint   `gorm:"primaryKey" json:"id"`
+	Username     string `gorm:"unique" json:"username"`
+	PasswordHash string `json:"-"`
+	Role         string `json:"role"` // admin, sales, warehouse, etc
+	CreatedAt    time.Time
+	UpdatedAt    time.Time
+}