feat: activity log producers

internal/domain/user/userDomain.go

@@ -15,6 +15,7 @@ var ErrInvalidPasswordResetCode = errors.New("invalid password reset code")
 var ErrPasswordResetCodeExpired = errors.New("password reset code expired")
 var ErrInvalidDisplayName = errors.New("invalid display name")
 var ErrUsernameTaken = errors.New("username taken")
+var ErrVerificationEmailNotSent = errors.New("verification email not sent")
 
 type Role string