JIRA Provider
Padmin
In Padmin, go to System settings > Authentication. To add a Jira provider, choose the Jira OAuth2 provider type. The provider form has these fields: Name*, Tenant*, Tech user* and App token*, and the Use SAML auth, Authentication groups and Permission groups settings.
Atlassian
Visit the Atlassian sign-in page: https://id.atlassian.com/login
If you do not have a profile yet, sign up for an account. You can sign up through one of the three accounts listed below, or simply enter your email address. If you gave your own email address, a confirmation message arrives; selecting its link lets you define a password.
Then give your name and define a password. After the first sign-in that comes with the registration, you get to the home page.
At the bottom, select Jira Software. On the next page: Get it free. Then choose Jira Service Management as a second product: Select, then Next.
Give your Jira company name (tenant name). You will sign in with the URL made from it. Then: Agree.
You may see some starting questions; you can skip them all if you like. You must give a project name, which you will see later too. At the end, the project name appears.
PassMan Connector for Jira Cloud
Stay signed in to Atlassian, and visit the Marketplace, where the add-on app is: PassMan Connector for Jira Cloud
Allow adding it: Get it now, Request App. Then, in the top menu bar, go to the Apps tab, where the PassMan Connector app should appear.