ASP NET Core Identity tutorial from scratch

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ASP.NET Core Identity

ASP.NET Core Identity is a membership system. It allows us to create, read, update and delete user accounts. Supports account confirmation, authentication, authorization, password recovery, two-factor authentication with SMS. It also supports external login providers like Microsoft, Facebook, Google etc. We will discuss implementing these features in our upcoming videos in this series.

Adding ASP.NET Core Identity Support in ASP.NET Core Application

The following are the steps to add and configure ASP.NET Core Identity

Step 1 : Inherit from IdentityDbContext class

public class AppDbContext : IdentityDbContext
{
// Rest of the code
}

Step 2 : Add ASP.NET Core Identity Services

In ConfigureServices() method of the Startup class, include the following line of code.

services.AddIdentity[IdentityUser, IdentityRole]()
.AddEntityFrameworkStores[AppDbContext]();

AddIdentity() method adds the default identity system configuration for the specified User and Role types.

IdentityUser class is provided by ASP.NET core and contains properties for UserName, PasswordHash, Email etc. This is the clas that is used by default by the ASP.NET Core Identity framework to manage registered users of your application.

If you want store additional information about the registered users like their Gender, City etc. Create a custom class that derives from IdentityUser. In this custom class add the additional properties you need and then plug-in this class instead of the built-in IdentityUser class. We will discuss how to do this in our upcoming videos.

Step 3 : Add Authentication middleware to the request pipeline

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
app.UseStaticFiles();
app.UseAuthentication();
app.UseMvc(routes =]
{
routes.MapRoute("default", "{controller=Home}/{action=Index}/{id?}");
});
}

In the Configure() method of the Startup class, call UseAuthentication() method to add the Authentication middleware to the application's request processing pipeline. We want to be able to authenticate users before the request reaches the MVC middleware. So it's important we add authentication middleware before the MVC middleware in the request processing pipeline.

Step 4 : Add Identity Migration

In Visual Studio, from the Package Manager Console window execute the following command to add a new migration

Add-Migration AddingIdentity

This migration contains code that creates the tables required by the ASP.NET Core Identity system.

Error : The entity type 'IdentityUserLogin[string]' requires a primary key to be defined

If you get this error, the most likely cause is that you are overriding OnModelCreating() method in your application DbContext class but not calling the base IdentityDbContext class OnModelCreating() method.

Keys of Identity tables are mapped in OnModelCreating method of IdentityDbContext class. So, to fix this error, all you need to do is, call the base class OnModelCreating() method using the base keyword as shown below.

public class AppDbContext : IdentityDbContext
{
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Seed();
}
}

Step 4 : Generate ASP.NET Core Identity Tables

[kareemkaram]

The most comprehensive tutorial I've seen about Identity whether paid or not

[pochron]

Great course, not only everything works but explains what we are actually using. Going into definitions and discussing them is the way forward!

[meetit]

The best tutorial about Identity! I looked a lot of tutorials but only after that I understood what was going on. Thank You
Advice:
Pin all tutorials about Identity in the playlist. It will be easier to find new people in need

[bilalelmursi]

Venkat sir, you are an amazing teacher! can't describe in words!! Thank you very much for your help and looking forward for the rest of the videos

[silvesteronono]

Thank you. After struggling, I gained deeper understanding on injection, configuration, and application of Identity, as well as everything connects

[CARDSSerus]

You're a life saver man. Every other tutorial I found never showed how to add identity to existing DBs

[rajeshmule]

from fresher to experience, from 5000 per month to 120000 per month this achievement because of you. only

[cymrucoder]

Legend. Thanks so much for this series!

[MmMm-tgmq]

nice nice nice, interesting please don't stop you are great trainer

[talkathiriify]

Thank you very much
for this amazing series

[sabitkondakc]

Enchanting Tutorial, thanks a million as soon as I get my bulky salary I'll be donating your channel, your work is simply awesome!
In the meantime, NuGet package should be added before moving further with IdentityDbContext.

[Beast]

Good clear explanations. Thanks very much for this great content!

[girishparganiha]

Thank You Kudvenkat Sir. Understand this video...!!!

[vaddiparthivenkatamuralikr]

Thankyou very much for great videos as always

[luisgal]

Man you got a new subscriber. Thank you.

[MrTotobey]

you are the best brother. God bless you and your family

[misenheimer_music]

@kudvenkat Great tutorial! Love all your videos. I'm still not exactly sure about one thing. Did you create your own User class with..password, email, etc. as properties BEFORE all of the configuration? Or are the "UserIdentity" tables created upon the migration the user entities themselves? I hope this makes sense.

[prasannahiremath]

Hello Venkat,

Can we use our own tables instead of tables related to identity db context ? If yes, how to implement it ?

[baracuda]

When using ASP.NET Core 3.1 you can add the using statement for IdentityDbContext if you have previously added the following necessary packages for ASP.NET Core Identity with NuGet package manager:

[DharmendraSingh-lqrc]

There are no good examples of using ado.net and stored procedures with Asp.Net Core anywhere Mr Venkat. An example on how to use ado.net and stored procedures in Core would help greatly Sir. Thank you so much for all your hard work.