Use the GreenHopper (Jira Agile)APIs in plugin

Hi Community,

I need to use the Jira Agile APIs like
RapidViewService, BoardAdminService in my plugin and I added the dependency in my pm (com.atlassian.jira.plugins:jira-greenhopper-plugin:6.3.12) but the classes are not resolving.

How can I achieve this?

I am using Jira data center (8.13.X).

Anupam