The OAuth page on developer.atlassian.com shows how to authenticate clients against the Jira REST API using OAuth version 1.0a.

In the documentation though we state:

You must pass the data in the header instead, for example, Authorization: Bearer {access_token}.

However, this is only available for OAuth 2.0 and not 1.0 which causes confusion on how to authenticate. We should remove this part from the documentation.