Optional ContextOptional Identifier?: stringThe identifier to get messages for - an email address, mailbox ID, in the case of SMS, could be a phone number. In the case of other systems could be a User ID for FB Messenger/WhatsApp, etc.
This is optional if the provider supports getting messages based on credentials alone as some credentials/providers can be scoped to a specific mailbox/user.
Optional IncludeOptional, include the headers in the response (defaults to false)
The number of messages to return
Optional UnreadOptional. If true, only messages not marked as read will be returned
Optional, any provider-specific parameters that are needed to get messages