刷新访问令牌

Question

我遵循这个确切的指南（最后卷曲），使用刷新令牌刷新access_token，但这不起作用。 https://developers.onelogin.com/openid-connect/api/refresh-session

public class CustomList<T>
{
    private List<T> internalList = new List<T>();
    public T this[int index] { 
        get{ return internalList[index]; } 
        set{ internalList[index] = value;} 
    } //Error

    public void Add(T item)
    {
        // Method logic goes here.
    }
    public void Remove(T item)
    {
        // Method logic goes here.
    }
}