Confirm email feature

[Mike6x]

Hi All,

I try to migrate this feature from v1, but unsucessfully. I always catch the error with usermanager... Please support me !!!

Flow is my code:

1. Endpoint:
   ` public static class GetConirmEmailEndpoint
   {
   internal static RouteHandlerBuilder MapGetCornfirmEmailEndpoint(this IEndpointRouteBuilder endpoints)
   {
   return endpoints.MapGet("/confirm-email", async (
   [FromQuery] string userId,
   [FromQuery] string code,
   [FromQuery] string tenant,
   HttpContext context,
   ITenantService tenantService,
   IUserService userService,
   CancellationToken cancellationToken) =>
   {
   TenantDetail tenantDetail = await tenantService.GetByIdAsync(tenant) ?? throw new NotFoundException($"Tenant: {tenant} not found");
   var tenantInfo = tenantDetail.Adapt();
   context.SetTenantInfo(tenantInfo, true);

            context.Request.Headers.Append("tenant", tenant);
            
   
            return Task.FromResult(userService.ConfirmEmailAsync(userId, code, tenant, cancellationToken));
        })
        .WithName(nameof(GetConirmEmailEndpoint))
        .WithSummary("Confirm email")
        .WithDescription("Confirm email address for a user.")
        .AllowAnonymous();
    }
   

   }`

2. Service
   ` public async Task ConfirmEmailAsync(string userId, string code, string tenant, CancellationToken cancellationToken)
   {
   EnsureValidTenant();

    var user = await userManager.Users
        .Where(u => u.Id == userId )
        .FirstOrDefaultAsync(cancellationToken) ?? throw new NotFoundException($"User with Id: {userId} not found!");
   
    if (user!.EmailConfirmed) return  $"Account: {userId}  already confirmed with E-Mail {user.Email} ";
    code = Encoding.UTF8.GetString(WebEncoders.Base64UrlDecode(code));
    var result = await userManager.ConfirmEmailAsync(user, code);
    return result.Succeeded
        ? $"Account Confirmed for E-Mail {user.Email}. You can now use the /api/tokens endpoint to generate JWT."
        : throw new InternalServerException($"An error occurred while confirming {user.Email}");
   

   }`