Asp.net web api by default contains some pre configured fields that can handle the registration of a user in a web app. Some of them are Email, Password, Confirm Password and others. You can extend those properties and include your own for your purposes with the following procedure.
First of all you need to execute some commands in the package manager. You can find nuget package manager in Tools -> Nuget Package Manager -> PM Console
The first thing to do is to enable Migrations
Enable-Migrations
The you can go to Models\AccountBindingModels.cs and add your property to the class RegisterBindingModel. Also add the same property in the Models\IdentityModels.cs inside ApplicationUser class. For example lets assume you want to add a username in the registration proccess. For this purpose you can use the following line
public string AppUserName { get; set; }
Also include in the file.
using System;
The you must execute:
Add-Migration "AppUserName" Update-Database
Those commands will run all the migration files and update the database schema to add a AppUserName column in your database.
Then update the registration action in Controllers\AccountController.cs to store AppUserName as well.
var user = new ApplicationUser() { UserName = model.Email, Email = model.Email, AppUserName = model.AppUserName };
It was that easy. you can finally find AppUserName in your database.
