# `zappier/auth`

**Package:** `zappier`  
**Source:** `packages/zappier/src/auth.ts`  
**Lines:** 84

## What this module is

Implementation module in `zappier`. The tables below are extracted from the source (signatures + JSDoc).

## Exports

`BillingType`, `Customer`, `CustomerRepo`, `InMemoryCustomerRepo`, `apiKeyAuth`

## Types / interfaces / classes

| Kind | Name |
|------|------|
| interface | `Customer` |
| interface | `CustomerRepo` |
| type | `BillingType` |
| class | `InMemoryCustomerRepo` |

## Functions

| Name | Parameters | Param types (JSDoc) | Returns | Calls (same file / helpers) |
|------|------------|---------------------|---------|-----------------------------|
| `apiKeyAuth` | `repo: CustomerRepo` | — | `unknown` | see Call graph |

## Methods (class / object)

| Name | Parameters |
|------|------------|
| `findByApiKey` | `apiKey: string` |
| `findByEmail` | `email: string` |
| `list` | `(none)` |
| `save` | `customer: Customer` |
| `constructor` | `customers: Customer[] = []` |
| `findByApiKey` | `apiKey: string` |
| `findByEmail` | `email: string` |
| `list` | `(none)` |
| `save` | `customer: Customer` |
| `return` | `req, res, next` |

## What it imports / requires

- `express`

## Call graph (identifiers invoked)

`findByApiKey`, `findByEmail`, `list`, `save`, `constructor`, `arrays`, `map`, `find`, `toLowerCase`, `findIndex`, `push`, `apiKeyAuth`, `header`, `status`, `json`, `next`

Each identifier is a call site in this file. Follow the import list to see the defining module; open that module’s MD for parameter and return types.

## Return values (how to read this)

- HTTP route handlers return Express `res.json(...)` bodies (see route docs).
- Zapier `perform` functions return a **single object** (creates) or an **array** (triggers/searches).
- Pricing functions return integer **cents** on `Quote.totalCents`.