Allowing Multiple Accounts from the Same E-Mail Address WEB API ASP.NET IDENTITY

Question

I want to create multiple users using asp.net identity framework with same email addresses and different usernames .

Is it possible?

When I try to create users with same email address i get this error

{
  "message": "The request is invalid.",
  "modelState": {
    "": [
      "Email 'tester123@live.com' is already taken."
    ]
  }
}

Answer 1

You can configure UserValidator of UserManager : RequireUniqueEmail = false . Example code for default MVC5 with Individual User Accounts:

public static ApplicationUserManager Create(IdentityFactoryOptions<ApplicationUserManager> options, IOwinContext context) 
{
    var manager = new ApplicationUserManager(new UserStore<ApplicationUser>(context.Get<ApplicationDbContext>()));

    // Configure validation logic for usernames
    manager.UserValidator = new UserValidator<ApplicationUser>(manager)
    {
        AllowOnlyAlphanumericUserNames = false,
        RequireUniqueEmail = false 
    };

    ...

    return manager;
}

You might need to set it in ApplicationUserManager class constructor:

public ApplicationUserManager(IUserStore<ApplicationUser> store) : base(store)
{
    UserValidator = new UserValidator<ApplicationUser>(this)
    {
        AllowOnlyAlphanumericUserNames = false,
        RequireUniqueEmail = true
    };
 }