A module to implement sending of a token to a user.

Allows you to glue sending of instructions to swoosh, ex_twilio or whatever notification system is appropriate for your application.

Note that the return value and any failures are ignored. If you need retry logic, etc, then you should implement it in your sending system.

Example

Implementing as a module:

defmodule MyApp.PasswordResetSender do
  use AshAuthentication.Sender
  import Swoosh.Email

  def send(user, reset_token, _opts) do
    new()
    |> to({user.name, user.email})
    |> from({"Doc Brown", "emmet@brown.inc"})
    |> subject("Password reset instructions")
    |> html_body("""
      <h1>Password reset instructions</h1>
      <p>
        Hi #{user.name},<br />

        Someone (maybe you) has requested a password reset for your account.
        If you did not initiate this request then please ignore this email.
      </p>
      <a href="https://example.com/user/password/reset?#{URI.encode_query(reset_token: reset_token)}\">
        Click here to reset
      </a>
    """)
    |> MyApp.Mailer.deliver()
  end
end

defmodule MyApp.Accounts.User do
  use Ash.Resource,
    extensions: [AshAuthentication],
    domain: MyApp.Accounts

  authentication do
    strategies do
      password :password do
        resettable do
          sender MyApp.PasswordResetSender
        end
      end
    end
  end
end

You can also implement it directly as a function:

defmodule MyApp.Accounts.User do
  use Ash.Resource,
    extensions: [AshAuthentication],
    domain: MyApp.Accounts

  authentication do
    strategies do
      password :password do
        resettable do
          sender fn user, token ->
            MyApp.Mailer.send_password_reset_email(user, token)
          end
        end
      end
    end
  end
end