/// <summary>
/// Returns the roles for a given TUser
/// </summary>
/// <param name="user"></param>
/// <returns></returns>
public async Task <IList <string> > GetRolesAsync(TUser user)
{
if (user == null)
{
throw new ArgumentNullException("user");
}
List <string> roles = await userRolesService.FindByUserIdAsync(user.Id);
{
if (roles != null)
{
return(roles);
}
}
return(null);
}
