C# 如何在Asp net Core 2中获取Firebase IssuersingKey

我正在使用Firebase进行身份验证的移动应用程序上工作，但我无法在asp net core 2应用程序上验证Firebase的Jwt，我遇到的问题是获取IssuerSigningKey，下面是我在asp net core启动类中的代码示例。根据Firebase文档，他们说我应该从获得证书。我不能从那里开始

 services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
   .AddJwtBearer(options =>
   {
       options.TokenValidationParameters = new TokenValidationParameters
       {
           ValidateIssuer = true,
           ValidateAudience = true,
           ValidateLifetime = true,
           ValidateIssuerSigningKey = true,
           ValidIssuer = Configuration["Jwt:Issuer"],
           ValidAudience = Configuration["Jwt:aud"],
           IssuerSigningKey = 

       };
   });

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我终于从这个网站上找到了答案，我需要添加的只是选项；以及删除颁发者签名密钥

 services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
 .AddJwtBearer(options =>
 {
     options.Authority = Configuration["Jwt:Issuer"];
   options.TokenValidationParameters = new TokenValidationParameters
   {
       ValidateIssuer = true,
       ValidateAudience = true,
       ValidateLifetime = true,
       ValidateIssuerSigningKey = true,
       ValidIssuer = Configuration["Jwt:Issuer"],
       ValidAudience = Configuration["Jwt:aud"],

   };
});