We are in the process of moving Jira and confluence to cloud. However we decided our bitbucket to move to the datacentre. We want all these three products to be authenticated through the Atlassian Access. Is it possible to have it directly from the Atlassian access or do we need to use third party plugin ? If so how secure can 3rd party plugins be for authentication, because we don't know the vendor, if they can be trusted, supply chain attack etc. Does Atlassian provide any support and assurance for the same.