如何在IdentityServer4中配置多个Oidc提供程序

services.AddIdentityServer()
    .AddInMemoryClients(new List<Client>
    {
        new Client
        {
            ClientId = "client1",
            ClientSecrets = { new Secret("secret1".Sha256()) },
            AllowedGrantTypes = GrantTypes.Code,
            RedirectUris = { "https://client1/callback" },
            PostLogoutRedirectUris = { "https://client1/logout" },
            AllowedScopes = { "openid", "profile", "email" },
            RequireConsent = false
        },
        new Client
        {
            ClientId = "client2",
            ClientSecrets = { new Secret("secret2".Sha256()) },
            AllowedGrantTypes = GrantTypes.Code,
            RedirectUris = { "https://client2/callback" },
            PostLogoutRedirectUris = { "https://client2/logout" },
            AllowedScopes = { "openid", "profile" },
            RequireConsent = false
        }
    })
    .AddInMemoryIdentityResources(new List<IdentityResource>
    {
        new IdentityResources.OpenId(),
        new IdentityResources.Profile(),
        new IdentityResources.Email()
    })
    .AddInMemoryApiResources(new List<ApiResource>())
    .AddInMemoryApiScopes(new List<ApiScope>());

app.UseIdentityServer();

app.UseEndpoints(endpoints =>
{
    endpoints.MapDefaultControllerRoute();
    endpoints.MapGet("/.well-known/openid-configuration", async context =>
    {
        var discoveryDocument = new DiscoveryDocumentResponse
        {
            Issuer = "https://identityserver",
            AuthorizationEndpoint = "https://identityserver/connect/authorize",
            TokenEndpoint = "https://identityserver/connect/token",
            UserInfoEndpoint = "https://identityserver/connect/userinfo",
            EndSessionEndpoint = "https://identityserver/connect/endsession",
            JwksUri = "https://identityserver/.well-known/jwks"
        };

        await context.Response.WriteAsJsonAsync(discoveryDocument);
    });
});

services.AddAuthentication(options =>
{
    options.DefaultScheme = "Cookies";
    options.DefaultChallengeScheme = "oidc";
})
.AddCookie("Cookies")
.AddOpenIdConnect("oidc", options =>
{
    options.Authority = "https://identityserver";
    options.ClientId = "client1";
    options.ClientSecret = "secret1";
    options.ResponseType = "code";
    options.Scope.Add("openid");
    options.Scope.Add("profile");
    options.Scope.Add("email");
    options.SaveTokens = true;
});