Add watcher from Jira Rest Api. I am able to add by username but I want with email id.

[Priya Singh]

I have a requirement in which I want an email id to add as watcher.

Currently I am using com.atlassian.jira.rest.client.api;

IssueRestClient Interface for adding watchers to issue. I am able to add one by one with username but I have a requirement to add by email id as we will not have username of all the watchers we want to add in issue. And is there any solution by which directly we can add a distribution list as a watcher?

I am creating Rest api using Spring boot.

Thanks in advance for help..