关于c＃：如何在.NET Core 3.0中替换AddJwtBearer扩展

How to replace AddJwtBearer extension in .NET Core 3.0

我有以下代码可以在.NET Core 2.2中进行编译和工作：

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byte[] key = Encoding.ASCII.GetBytes(Constants.JWT_SECRET);
services.AddAuthentication(x =>
{
x.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
x.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(x =>
{
x.RequireHttpsMetadata = false;
x.SaveToken = true;
x.TokenValidationParameters = new TokenValidationParameters
{
ValidateIssuerSigningKey = true,
IssuerSigningKey = new SymmetricSecurityKey(key),
ValidateIssuer = false,
ValidateAudience = false
};
});

在.NET Core 3.0中，出现错误：

Error CS1061 'AuthenticationBuilder' does not contain a definition for
'AddJwtBearer' and no accessible extension method 'AddJwtBearer'
accepting a first argument of type 'AuthenticationBuilder' could be
found (are you missing a using directive or an assembly reference?)

当我查看MSFT文档时：
https://docs.microsoft.com/zh-cn/dotnet/api/microsoft.extensions.dependencyinjection.jwtbearerextensions.addjwtbearer?view=aspnetcore-2.2

并尝试升级到3.0版，这似乎是定义此版本的最后一个版本。如何将AddJwtBearer迁移到Core 3.0？