Aaru.Server/Aaru.Server.New/Components/Account/Shared/ExternalLoginPicker.razor

@using Microsoft.AspNetCore.Authentication
@using Microsoft.AspNetCore.Identity
@inject SignInManager<IdentityUser> SignInManager
@inject IdentityRedirectManager     RedirectManager

@if(externalLogins.Length == 0)
{
    <div>
        <p>
            There are no external authentication services configured. See this
            <a href="https://go.microsoft.com/fwlink/?LinkID=532715">
                article
                about setting up this ASP.NET application to support logging in via external services
            </a>.
        </p>
    </div>
}
else
{
    <form action="Account/PerformExternalLogin" class="form-horizontal" method="post">
        <div>
            <AntiforgeryToken/>
            <input name="ReturnUrl" type="hidden" value="@ReturnUrl"/>
            <p>
                @foreach(AuthenticationScheme provider in externalLogins)
                {
                    <button class="btn btn-primary" name="provider" title="Log in using your @provider.DisplayName account" type="submit" value="@provider.Name">@provider.DisplayName</button>
                }
            </p>
        </div>
    </form>
}

@code {
    private AuthenticationScheme[] externalLogins = [];

    [SupplyParameterFromQuery]
    private string? ReturnUrl { get; set; }

    protected override async Task OnInitializedAsync()
    {
        externalLogins = (await SignInManager.GetExternalAuthenticationSchemesAsync()).ToArray();
    }

}