emiaj

<template>
  <require from="nav-bar.html"></require>
  <require from="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"></require>

  <nav-bar router.bind="router"></nav-bar>

  <div class="page-host" style="margin-top:50px">
    <router-view></router-view>
  </div>
</template>

emiaj

public class UniqueUsernameRule : IFieldValidationRule
{
	
	public void Validate(Accessor accessor, ValidationContext context)
	{
		var email = accessor.GetValue(context.Target) as EmailAddress;
		var repository = context.Services.Get<IEntityRepository>();
		if (email == null) return;

		var isUnique = !repository.All<User>().Any(x => x.Username.Equals(email.Address, StringComparison.OrdinalIgnoreCase));