This is a small library for authenticating with an Atlassian API (such as the Jira API) as an Atlassian Connect App.
Note that the query string hash implementation is incomplete; there are a lot of special cases that are not yet handled.
Relevant documentation: - https://developer.atlassian.com/cloud/jira/platform/integrating-with-jira-cloud - https://developer.atlassian.com/cloud/jira/platform/security-for-connect-apps - https://developer.atlassian.com/cloud/jira/platform/understanding-jwt