Find new FreshBooks clients missing from your Mailchimp audience

**Objective:** List FreshBooks clients who signed up on or after `{signup-since}` and are not members of the Mailchimp audience `{list-name}`.

**Step 1: Get recent clients (freshbooks server)**

Call `freshbooks-get-client` with `signup-date.from` set to `{signup-since}` (and `company` `{company}` if given). Keep `id`, name, `organization` and `email`. Set aside clients with no email.

**Step 2: Check the audience (mailchimp server)**

Call `mailchimp-get-list-member` with `list-name` set to `{list-name}` and `email` set to each client's email. A client is on the audience if a row comes back, whatever its `status`. Note the status of those found, because unsubscribed or cleaned contacts must not be re-added.

**Step 3: Report**

Three groups: clients missing from the audience (name, organization, email, signup date), clients on the audience with a status of unsubscribed or cleaned, and clients with no email. Give the counts first.

**Rules & Guidelines:**

* `freshbooks-get-client` is on the freshbooks server. `mailchimp-get-list-member` is on the mailchimp server.
* Read-only. Do not call `mailchimp-add-list-member` or any other add, update or delete tool. The `subscribe-missing-clients` prompt does the adding.

**Validation:**

* If `{list-name}` matches no audience, say so and stop.
* If no clients signed up in the period, report that and stop.