Create an API to convert user references stored in JQL to AAID during the migration

We are adding capabilities to the Cloud Migrations Assistants to migrate app data automatically. This functionality requires Marketplace Partners to build automated migration paths compatible with the Cloud Migration Assistants; they can do so using the App migration platform.

Apps that store JQL may be storing JQL containing user references that will not work correctly in cloud. These user references will need to be converted from the format used in server (username / user key) to the format used in cloud (AAID) during the migration.