Unable to Authenticate REST API using Bearer token[OAuth 2.0]

[Satyajit.Banerjee]

I have been trying to use O Auth 2.0 to Authenticate JIRA API, but somehow unable to Do that using Bearer Token. Below if the screenshot of the image

[Satyajit.Banerjee]

After Changing the Authorization Header to "X-Atlassian-Token", i am able to get 200 response but Blank packet is received