由于以下原因之一，setuser 失败: 数据库主体 '%1' 不存在，与数据库主体对应的服务器主体没有服务器访问权限，无法模拟此类型的数据库主体或您没有权限。

Setuser failed because of one of the following reasons: the database principal '%1' does not exist, its corresponding server principal does not have server access, this type of database principal cannot be impersonated, or you do not have permission.