InfluxDB - Unauthorized Access Issue

I'm new to InfluxDB and encountering an "unauthorized access" issue when trying to connect to my InfluxDB instance using the Python influxdb library. I'm receiving the following error message:
Reason: Unauthorized
HTTP response headers: HTTPHeaderDict({'Content-Type': 'application/json; charset=utf-8', 'X-Influxdb-Build': 'OSS', 'X-Influxdb-Version': 'v2.7.0', 'X-Platform-Error-Code': 'unauthorized', 'Date': 'Wed, 17 May 2023 15:03:50 GMT', 'Content-Length':
'55'})
HTTP response body: {"code":"unauthorized","message":"unauthorized access"}

Code Snippet that I tried from the InfluxDB documentation to connect using the python client library, was trying this to get familiar with the process :

 import influxdb_client, os, time
 from influxdb_client import InfluxDBClient, Point, WritePrecision
 from influxdb_client.client.write_api import SYNCHRONOUS

 token = os.environ.get("INFLUXDB_TOKEN")
 org = "Org_Name"
 url = "http://localhost:8086"

 write_client = influxdb_client.InfluxDBClient(url=url, token=token, org=org)

 bucket="SensorDB"

 write_api = write_client.write_api(write_options=SYNCHRONOUS)
   
 for value in range(5):
   point = (
     Point("measurement1")
     .tag("tagname1", "tagvalue1")
     .field("field1", value)
   )
   write_api.write(bucket=bucket, org="Org_Name", record=point)
   time.sleep(1) # separate points by 1 second

What could be the cause of this error, and how can I resolve it?

Any guidance or suggestions would be greatly appreciated. Thank you!your text

Assuming the token is set up correctly your InfluxDB instance, the problem is probably something to do with how the INFLUXDB_TOKEN environment variable is being set (or it's value.) To troubleshoot, you might try temporarily printing out the value of token and making sure it's the correct token.