mongodb-从C运行原始mongo命令#

我尝试从 C# 运行原始 mongo 命令，这是我有兴趣在 C# 中运行的命令

db.getUser("MyUser")

我试过了

    public static async Task GetUserInfoAsync(this IMongoDatabase database, string username, string databaseName)
    {
        try
        {
            BsonDocument document = new BsonDocument
            {
                {"usersInfo", new BsonDocument
                    {
                        { "user", username},
                        { "db", databaseName}
                    }
                }
            };

            BsonDocumentCommand command = new BsonDocumentCommand(document);

            var t = await database.RunCommandAsync(command);
        }
        catch (Exception ex)
        {
            throw;
        }
    }

我得到的是

好的=1，用户=[]

无论用户是否存在