ASP.NET MVC: Login with Google Account

Step 1: To use the google login, you must register your app project on the Google API Console and get a Google API key which you can add to your app

Step 2: Open _ExternalLoginsListPartial view, then change code as below

@model MvcDemo.Models.ExternalLoginListViewModel
@using Microsoft.Owin.Security

<h4>Use another service to log in.</h4>
<hr />
@{
    var loginProviders = Context.GetOwinContext().Authentication.GetExternalAuthenticationTypes();
    if (loginProviders.Count() == 0)
    {
        <div>
            <p>
                There are no external authentication services configured. See <a href="http://go.microsoft.com/fwlink/?LinkId=403804">this article</a>
                for details on setting up this ASP.NET application to support logging in via external services.
            </p>
        </div>
    }
    else
    {
        using (Html.BeginForm("ExternalLogin", "Account", new { ReturnUrl = Model.ReturnUrl }))
        {
            @Html.AntiForgeryToken()            
            <div class="social-auth-links text-center">
                <p>- OR -</p>
                <p>
                    @foreach (AuthenticationDescription p in loginProviders)
                    {
                        <button type="submit" class="btn btn-block btn-social btn-google btn-flat" id="@p.AuthenticationType" name="provider" value="@p.AuthenticationType">
                            <i class="fa fa-google-plus"></i> Sign in using Google+
                        </button>
                    }
                </p>                
            </div>
        }
    }
}

VIDEO TUTORIALS