How do I authenticate using requests for google drive v3 api calls

I'm trying to use requests in python with the google drive api v3. I can get my script to authenticate and run calls with a service. But I notice that most of the documentation for API V3 shows examples using http requests under the "reference" tab. When I try to complete a call using requests, I'm not sure how to put my Oath 2.0 authentication in to reference the token.pickle. Tried to force the token to a string but did not work. The whole script is below. You can see the "#delete mp4File" section is where I'm trying to create a request and add authentication. This is where I need help.

    from __future__ import print_function
import pickle
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
import os
import io
from googleapiclient.http import MediaIoBaseDownload
import requests

# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/drive.metadata',
          'https://www.googleapis.com/auth/drive',
          'https://www.googleapis.com/auth/drive.file'
          ]

def main():
    """Shows basic usage of the Drive v3 API.
    Prints the names and ids of the first 10 files the user has access to.
    """
    creds = None
    # The file token.pickle stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first
    # time.
    if os.path.exists('token.pickle'):
        with open('token.pickle', 'rb') as token:
            creds = pickle.load(token)
    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(
                'client_secrets.json', SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open('token.pickle', 'wb') as token:
            pickle.dump(creds, token)

    service = build('drive', 'v3', credentials=creds)

    # List contents of mp4 folder
    results = service.files().list(
        q="'XXXXXXXXXXXXXXXXXXXX' in parents", pageSize=1).execute()
    items = results.get('files', [])

    if not items:
        print('No files found.')
    else:
        for item in items:
            mp4File=(u'{0}'.format(item['id']))
            mp4Name=(u'{0}'.format(item['name']))
            print (mp4Name + " " + mp4File)

    # Download mp4File
    file_id = mp4File
    request = service.files().get_media(fileId=file_id)
    fh = io.FileIO(mp4Name, 'wb')
    downloader = MediaIoBaseDownload(fh, request)
    done = False
    while done is False:
        status, done = downloader.next_chunk()

    #delete mp4File
    url = "https://www.googleapis.com/drive/v3/files/" + file_id

    headers = {
                'Authorization': 'Bearer ' + str(token)
                }

    response = requests.request("DELETE", url, headers=headers)

    print(response.text.encode('utf8'))



if __name__ == '__main__':
    main()