fix mistake

handler/users.go

@@ -36,7 +36,7 @@ func (h *Handler) GetUser(c echo.Context) error {
 		return c.NoContent(http.StatusBadRequest)
 	}
 
-	tx := h.DB.Preload("Position").Where("id = ?", id).Find(user)
+	tx := h.DB.Preload("Position").Where("id = ?", id).Find(&user)
 
 	if tx.RowsAffected == 0 {
 		return c.NoContent(http.StatusNotFound)