Michael, it appears that Atlassian is in the process of deprecating Basic authentication for Jira Cloud REST API calls(ACJIRA-1465) and now requires an API token. According to the documentation you can simply replace the PW with the API token you generate from your Jira instance. If you have admin creds you will be able to create a token. If their documentation holds true you should be able to enter your email as the username and the token as the password when you enter your Jira credentials and that will allow the REST calls to be authenticated. I have not tried this yet because I am using the on-prem version of Jira. I just got a personal Jira Cloud instance created, but have not had a chance to do anything with it yet. Give it a shot and let me know if it works for you.