fully implement acl backend and interface

internal/user/errors.go

@@ -0,0 +1,7 @@
+package user
+
+import "fmt"
+
+var (
+	ErrUserNotFound = fmt.Errorf("user not found")
+)

internal/user/model.go

@@ -5,10 +5,9 @@ import (
 )
 
 type User struct {
-	ID       uint   `gorm:"primaryKey"`
-	Username string `gorm:"uniqueIndex;not null"`
-	Email    string `gorm:"uniqueIndex;not null"`
-	Password string `gorm:"not null"`
-	//Roles     []acl.Role     `gorm:"many2many:user_roles"`
+	ID        uint           `gorm:"primaryKey"`
+	Username  string         `gorm:"uniqueIndex;not null"`
+	Email     string         `gorm:"uniqueIndex;not null"`
+	Password  string         `gorm:"not null"`
 	DeletedAt gorm.DeletedAt `gorm:"index"`
 }