Developers will be able to access a service from velocity templates to access UPP data. The item is called uppVelocityApi from within Velocity.
getProperty(user, profileElementName): This method returns the value of the given profile element for the given user. It accepts the following parameters:
user: The user to retrieve the value for. Type: com.atlassian.user.User
profileElementName: Default name of the profile element, typically the English name. Type: String
Field names are not unique. This method will return the value of the first found field with the name, which is visible (i.e. not hidden). To determine the first field, the order as defined at the administration is used.