身份找不到我的用户

Question

[HttpPost]
public async Task<IActionResult> ForgotPassword([FromBody] RegisterDto model)
 {
    var user = await _userManager.FindByEmailAsync(model.Email);
    if (user == null)
       return Content("Email id not exist");
    var passwordResetToken = await _userManager.GeneratePasswordResetTokenAsync(user);
    var passwordResetUrl = Url.Action("ResetPassword", "Account", new { id = user.Id, token = passwordResetToken }, Request.Scheme);
    await _messageService.Send(model.Email, "Password reset", $"Click <a href=\"" + passwordResetUrl + "\">here</a> to reset your password");
    return Content("Check your email for a password reset link");
 }

我正在调试这个方法，我从邮递员传递我的电子邮件ID，电子邮件ID在我的数据库中，但仍然无法让我的用户回来。你能告诉我错误我在做什么。

问候