Understand the jargon we use

Access TokenA JWT used to grant access to APIs.
AccountContains contact and billing information.  Contains one or more API Spaces
API SpacePartition of the platform, containing isolated configuration and data.  May also have isolated processing.
App MessagingApp / web based two way messaging
App UserThe end user interacting with a client SDK
ChannelChannel / route to which a message will be delivered, e.g. SMS, App Messaging, Facebook etc.
ConversationRelated, ordered set of messages with an id and specific set of Participants.
InboxThe ability to send push and content into an Inbox inside a customer’s app / web site. (Formally known as Donky)
Messaging APIThis is the messaging component of the Enterprise Communications API providing a unified messaging API able to send to any configured Channel, including SMS, Messaging, Inbox, Facebook Messenger.
ParticipantSomeone involved in a Conversation.  May be an App User or a Platform User.
Platform UserBelongs to an account.  Can log in to the portal and perform permitted actions.
ProfileInformation related to a particular App User or Platform User.  Can contain custom data and can also be used to access message history.
RulesRules which define the platform functionality, for example which Channel should be used to deliver a message.