Asp.net mvc 在Asp.Net Identity中为自定义UserManager设置Owin

我正在使用neo4j.AspNet.Identity对我的网站进行身份验证，我有以下类连接到数据库，名称为GraphClientWrapper和Neo4jUserManager。GraphClientWrapper类为：

 using System;
using Neo4jClient;

/// <summary>A wrapper class to allow the GraphClient to be used within the OWIN framework (must implement <see cref="IDisposable"/>)</summary>
public class GraphClientWrapper : IDisposable
{
    public GraphClientWrapper(IGraphClient graphClient)
    {
        GraphClient = graphClient;
    }

    public IGraphClient GraphClient { get; set; }

    public void Dispose()
    {
    }
}

但是要连接到数据库，我应该遵循以下代码

var gc = new GraphClient(new Uri("http://localhost.:7474/db/data"));
gc.Connect();
var graphClientWrapper = new GraphClientWrapper(gc);
var manager = new Neo4jUserManager(new Neo4jUserStore<ApplicationUser>(graphClientWrapper.GraphClient));  

问题是我不知道如何设置owin来使用我的自定义UserManager。有人能帮忙设置owin吗

var gc = new GraphClient(new Uri("http://localhost.:7474/db/data"));
gc.Connect();
var graphClientWrapper = new GraphClientWrapper(gc);
var manager = new Neo4jUserManager(new Neo4jUserStore<ApplicationUser>(graphClientWrapper.GraphClient));