btcpayserver/BTCPayServer/Views/Account/Login.cshtml

@using System.Collections.Generic
@using System.Linq
@using Microsoft.AspNetCore.Http
@using Microsoft.AspNetCore.Http.Authentication
@model LoginViewModel
@inject SignInManager<ApplicationUser> SignInManager

@{
    ViewData["Title"] = "Log in";
}

<section>
    <div class="container">
        <div class="row">
            <div class="col-lg-12 text-center">
                <h2 class="section-heading">@ViewData["Title"]</h2>
                <hr class="primary">
            </div>
            <div class="col-md-4">
                <section>
                    <form asp-route-returnurl="@ViewData["ReturnUrl"]" method="post">
                        <h4>Use a local account to log in.</h4>
                        <hr />
                        <div asp-validation-summary="All" class="text-danger"></div>
                        <div class="form-group">
                            <label asp-for="Email"></label>
                            <input asp-for="Email" class="form-control" />
                            <span asp-validation-for="Email" class="text-danger"></span>
                        </div>
                        <div class="form-group">
                            <label asp-for="Password"></label>
                            <input asp-for="Password" class="form-control" />
                            <span asp-validation-for="Password" class="text-danger"></span>
                        </div>
                        <div class="form-group">
                            <div class="checkbox">
                                <label asp-for="RememberMe">
                                    <input asp-for="RememberMe" />
                                    @Html.DisplayNameFor(m => m.RememberMe)
                                </label>
                            </div>
                        </div>
                        <div class="form-group">
                            <button type="submit" class="btn btn-default">Log in</button>
                        </div>
                        <div class="form-group">
                            <p>
                                <a asp-action="ForgotPassword">Forgot your password?</a>
                            </p>
                            <p>
                                <a asp-action="Register" asp-route-returnurl="@ViewData["ReturnUrl"]">Register as a new user?</a>
                            </p>
                        </div>
                    </form>
                </section>
            </div>
            <div class="col-md-6 col-md-offset-2">
                <section>
                    <h4>Use another service to log in.</h4>
                    <hr />
                    @{
                        var loginProviders = (await SignInManager.GetExternalAuthenticationSchemesAsync()).ToList();
                        if(loginProviders.Count == 0)
                        {
                            <div>
                                <p>
                                    There are no external authentication services configured. See <a href="https://go.microsoft.com/fwlink/?LinkID=532715">this article</a>
                                    for details on setting up this ASP.NET application to support logging in via external services.
                                </p>
                            </div>
                        }
                        else
                        {
                            <form asp-action="ExternalLogin" asp-route-returnurl="@ViewData["ReturnUrl"]" method="post" class="form-horizontal">
                                <div>
                                    <p>
                                        @foreach(var provider in loginProviders)
                                        {
                                            <button type="submit" class="btn btn-default" name="provider" value="@provider.Name" title="Log in using your @provider.DisplayName account">@provider.Name</button>
                                        }
                                    </p>
                                </div>
                            </form>
                        }
                    }
                </section>
            </div>
        </div>
    </div>
</section>
@section Scripts {
    @await Html.PartialAsync("_ValidationScriptsPartial")
}