Deactivate user failing due to OAuth 2.0

[Valiantys Support]

Hello,

When i want to deactivate a user for jira cloud via POST call /users/{account_id}/manage/lifecycle/disable  and using bearer Token i receive the following error message with status 403 : 

{

    "errorMessages": [

        "OAuth 2.0 is not enabled for method: POST /users/{account_id}/manage/lifecycle/disable"

    ]

}

Could you pleas help figure out what is the root cause ? 

Best regards