repo initialized with test cases

doc/models/vault-customer.md

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+
+# Vault Customer
+
+The details about a customer in PayPal's system of record.
+
+## Structure
+
+`VaultCustomer`
+
+## Fields
+
+| Name | Type | Tags | Description | Getter | Setter |
+|  --- | --- | --- | --- | --- | --- |
+| `id` | `?string` | Optional | The unique ID for a customer generated by PayPal.<br>**Constraints**: *Minimum Length*: `1`, *Maximum Length*: `22`, *Pattern*: `^[0-9a-zA-Z_-]+$` | getId(): ?string | setId(?string id): void |
+
+## Example (as JSON)
+
+```json
+{
+  "id": "id2"
+}
+```
+