Changing Username does not purge index records

[AlexMedia]

I'm currently working on a project with the following set-up:

• ASP.NET Core MVC 3.1.8, using the default Identity platform
• Default configuration: username = email, requiring unique emails and confirmed accounts
• Using ElCamino.AspNetCore.Identity.AzureTable v3.1.0, acquired from NuGet

I have come across an issue whereby the old username is not freed up after changing it via the Account area.

Steps to reproduce:

1. Create an account via the normal registration and confirmation flow
2. Log on, go into Account > Email, change Email, go through confirmation flow
3. Confirm that you can log in with the new email address
4. Log off
5. Try to register a new account using the previously used email address. The following error message appears:

   User name 'old-email@address.tld' is already taken.

I've done some investigation, and I suspect that the issue is caused by records in the AspNetIndex table not being cleaned up properly when the rename takes place.

In the source I see that SetEmailAsync is overridden to purge records from the index table, but no such thing seems to happen for SetUserNameAsync.

[dlmelendez]

@AlexMedia appreciate you filing this issue. Assigned to next release. Thank you for including all the information needed to debug the issue!

[dlmelendez]

fixed in v5-rc2