This plugin provides a way to send HTTP requests as part of a Rundeck workflow step. It is somewhat based on https://github.com/rvs-fluid-it/rundeck-httppost-plugin.
OAuth 2.0 only supports the Client Credentials Grant Type. The OAuth configuration is per-project or per-framework. This means that each job will share the entire project or entire frameworks credentials. However, this allows those credentials to be externalized into the framework configuration and avoids them being exported with projects.