code: def authenticate(job_args):
      
  
      # Load any authentication plugins as needed
      job_args = utils.check_auth_plugin(job_args)
  
      # Set the auth version
      auth_version = utils.get_authversion(job_args=job_args)
  
      # Define the base headers that are used in all authentications
      auth_headers = {
          'Content-Type': 'application/json',
          'Accept': 'application/json'
      }
  
      auth_headers.update(job_args['base_headers'])
  
      if auth_version == 'v1.0':
          auth = utils.V1Authentication(job_args=job_args)
          auth_headers.update(auth.get_headers())
          LOG.debug('Request Headers: [ %s ]', auth_headers)
  
          auth_url = job_args['os_auth_url']
          LOG.debug('Parsed Auth URL: [ %s ]', auth_url)
  
          auth_kwargs = {
              'url': auth_url,
              'headers': auth_headers
          }
      else:
          auth = utils.OSAuthentication(job_args=job_args)
          auth_url = auth.parse_region()
          LOG.debug('Parsed Auth URL: [ %s ]', auth_url)
  
          auth_json = auth.parse_reqtype()
          LOG.debug('Request Headers: [ %s ]', auth_headers)
  
          auth_body = json.dumps(auth_json)
          LOG.debug('Request JSON: [ %s ]', auth_body)
  
          auth_kwargs = {
              'url': auth_url,
              'headers': auth_headers,
              'body': auth_body
          }
  
      auth_resp = auth.auth_request(**auth_kwargs)
      if auth_resp.status_code >= 300:
          raise exceptions.AuthenticationProblem(
              'Authentication Failure, Status: [ %s ] Reason: [ %s ]',
              auth_resp.status_code,
              auth_resp.reason
          )
      else:
          return auth.parse_auth_response(auth_resp)
docs: Authentication For Openstack API.
  
      Pulls the full Openstack Service Catalog Credentials are the Users API
      Username and Key/Password.
  
      Set a DC Endpoint and Authentication URL for the OpenStack environment