add user crud interface in impl

internal/user/model.go

@@ -0,0 +1,11 @@
+package user
+
+import "gorm.io/gorm"
+
+type User struct {
+	ID        int64          `gorm:"primaryKey"`
+	Username  string         `gorm:"uniqueIndex;not null"`
+	Email     string         `gorm:"uniqueIndex;not null"`
+	Password  string         `gorm:"not null"`
+	DeletedAt gorm.DeletedAt `gorm:"index"`
+}