No authenticationScheme was specified, and there was no DefaultChallengeScheme found

在编写.net程序的关于JWT部分时遇到错误：

System.InvalidOperationException: No authenticationScheme was specified, and there was no DefaultChallengeScheme found. The default schemes can be set using either AddAuthentication(string defaultScheme) or AddAuthentication(Action<AuthenticationOptions> configureOptions).
   at Microsoft.AspNetCore.Authentication.AuthenticationService.ChallengeAsync(HttpContext context, String scheme, AuthenticationProperties properties)
   at Microsoft.AspNetCore.Authentication.AuthenticationServiceImpl.ChallengeAsync(HttpContext context, String scheme, AuthenticationProperties properties)
   at Microsoft.AspNetCore.Authorization.Policy.AuthorizationMiddlewareResultHandler.<>c__DisplayClass0_0.<<HandleAsync>g__Handle|0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)
 

这个错误的主要原因是没有找到默认的Scheme, 要保证提示的 Scheme 和 设置的DefaultScheme对应。

例如：

builder.Services.AddAuthentication(options =>
{
    options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(JwtBearerDefaults.AuthenticationScheme, options =>
{

中需要保持 option.DefaultScheme和 AddJwtBearer方法中第一个参数一样。