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oAuth2 security token - query connection

My company has created it's own java api to query a json file database. I have created a class to see if I can connect and query. That works, but it is not secure. It has my username and password in it.
A friend of mine created a python script to connect and query as well, however he is using oAuth2 with a token, and that works. I would like to use the oAuth2 token as well but in java.
Here is part of his code in python.
import requests
from requests import post, auth, exceptions
from json import loads
import pandas as pd
import time
from io import StringIO
client_id = 'CSI10BIRSTDEM_DEM~OrYZOp7y7aL3-OX__vvOi4tmBKHbabfK3UiI5d-rOEY'
client_secret = 'gETIknwsuCfFqvsHTKLsA79NQzakR1_2UMdJ0b0TlEQnKb9KzI64ytrPikwFSUGMPvVtBNELmU4AO8GV2HiTBQ'
user = 'CSI10BIRSTDEM_DEM#vRzhxJEjwyK5m6LSGfa5UykRbbaVj1KHWan7j0qz61PrAwezkCks0t3nrnSarLvvk5bh25GTIDGVzHj55C139Q'
password = 'cUKHtWFnjNrXJV7xznezG36c2LaNBYTv1nb9WIIsi-dAQBUfjOBGznCxOUOMKiIvYPYmGfnkivd2HV2toAA5uQ'
access_point = 'https://qac-sso.qac.awsdev.infor.com/CSI10BIRSTDEM_DEM/as/token.oauth2'
grant_type = 'password'
headers = {'Content-Type': 'application/x-www-form-urlencoded'}
auth = auth.HTTPBasicAuth(client_id, client_secret)
data = {'grant_type': grant_type,
'username': user,
'password': password}
resp = None
try:
resp = post(access_point, auth=auth, data=data, headers=headers, timeout=5)
except exceptions.ConnectionError:
pass
#print('Error')
if resp.status_code == 200:
resp = loads(resp.text)
if 'access_token' in resp:
access_token = resp['access_token']
########################
url = 'https://qac-ionapi.qac.awsdev.infor.com/CSI10BIRSTDEM_DEM/IONSERVICES/datalakeapi/v1/compass/jobs'
query = "SELECT TOP 10 * FROM csi_pertot_mst"
response = requests.post(str(url),data = query.encode('utf-8'), headers={'Content-Type':'text/plain','Authorization': 'Bearer {}'.format(access_token)})
if response.status_code == 202:
json_data = response.json()