Bulk Update User api giving 401 error when the authentication type is OAuth 2.0

Summary:

We are tying to deactivate users using Bulk Update User API, but it is giving 401 error when the authentication type is OAuth 2.0

https://companyname.bigmachines.com/rest/v14/users/actions/bulkUpdate

 

Request

{  "userData": {    "status": {      "value": 0    }  },  "criteria": {    "q": "{'email' :{'$like':'%useremail%'}}"  }} 

 Response

{    "error_description": "You are not authorized to access this page.",    "error_uri": "HTTP://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html",    "error": "You are not authorized to access this page."

We thought the Oauth user is missing User administrator permissions & we tried giving permission for this user from backend using api. we are getting the below error.