## Pass Issuer

The Passes issuer is the entity that owns the pass and is responsible for issuing passes to their customers. This could
be you, the developer, or the organization that you represent.

In order to become a Passes Issuer, you must first register as an Issuer.

## event ticket class

A `EventClass` can be thought of as scheduled event. An issuer may create multiple scheduled events with permutation of event names and timings.
Each `EventClass` representing a scheduled event may contain its own appearance and data fields to meet the venue-specific requirements.

In addition, `EventClass` can also be used to enable additional features like Smart Tap.

## event ticket object

A event ticket object is an instance of a `EventClass`. A new `EventObject` instance should be created for each customer
that is distributed with a event ticket.

## Pass Class

A `EventClass` is a type of Pass Class. Pass Classes describe general information for related Pass Objects (such as
style and appearance), and do not include customer details.

## Pass Object

A `EventObject` is a type of Pass Object. Like `EventObjects`, a Pass Object is an instance of a corresponding Pass
Class. A Pass Object should be created for each customer that is issued a event ticket.

Pass Objects contains customer-specific information. For example, it can be used to identify that a customer not only
has a ticket for a event, but also identify which seat on the event they've been allotted.

## Service account

The service account is the identity that is used to call the Google Wallet API. Permission to access the Passes API should be
granted to this service account.

## Service account key

The service account key is the credential used to authenticate your application as the service account. The service
account key should be considered highly sensitive and kept private. If a third party has access to the service account
key, they will be able to identify themselves as the service account and perform actions that the service account is
permitted to perform.