InvalidClientTokenId error when trying to access SQS from Celery - python-3.x

Question

When I try to connect to SQS using Celery, I'm not able to. The worker crashes with the following message:
[2022-10-28 14:05:39,237: CRITICAL/MainProcess] Unrecoverable error: ClientError('An error occurred (InvalidClientTokenId) when calling the GetQueueAttributes operation: The security token included in the request is invalid.')
Traceback (most recent call last):
File "/home/aditya/.local/lib/python3.10/site-packages/celery/worker/worker.py", line 203, in start
self.blueprint.start(self)
File "/home/aditya/.local/lib/python3.10/site-packages/celery/bootsteps.py", line 116, in start
step.start(parent)
File "/home/aditya/.local/lib/python3.10/site-packages/celery/bootsteps.py", line 365, in start
return self.obj.start()
File "/home/aditya/.local/lib/python3.10/site-packages/celery/worker/consumer/consumer.py", line 332, in start
blueprint.start(self)
File "/home/aditya/.local/lib/python3.10/site-packages/celery/bootsteps.py", line 116, in start
step.start(parent)
File "/home/aditya/.local/lib/python3.10/site-packages/celery/worker/consumer/tasks.py", line 38, in start
c.task_consumer = c.app.amqp.TaskConsumer(
File "/home/aditya/.local/lib/python3.10/site-packages/celery/app/amqp.py", line 274, in TaskConsumer
return self.Consumer(
File "/home/aditya/.local/lib/python3.10/site-packages/kombu/messaging.py", line 387, in __init__
self.revive(self.channel)
File "/home/aditya/.local/lib/python3.10/site-packages/kombu/messaging.py", line 409, in revive
self.declare()
File "/home/aditya/.local/lib/python3.10/site-packages/kombu/messaging.py", line 422, in declare
queue.declare()
File "/home/aditya/.local/lib/python3.10/site-packages/kombu/entity.py", line 606, in declare
self._create_queue(nowait=nowait, channel=channel)
File "/home/aditya/.local/lib/python3.10/site-packages/kombu/entity.py", line 615, in _create_queue
self.queue_declare(nowait=nowait, passive=False, channel=channel)
File "/home/aditya/.local/lib/python3.10/site-packages/kombu/entity.py", line 643, in queue_declare
ret = channel.queue_declare(
File "/home/aditya/.local/lib/python3.10/site-packages/kombu/transport/virtual/base.py", line 523, in queue_declare
return queue_declare_ok_t(queue, self._size(queue), 0)
File "/home/aditya/.local/lib/python3.10/site-packages/kombu/transport/SQS.py", line 633, in _size
resp = c.get_queue_attributes(
File "/home/aditya/.local/lib/python3.10/site-packages/botocore/client.py", line 514, in _api_call
return self._make_api_call(operation_name, kwargs)
File "/home/aditya/.local/lib/python3.10/site-packages/botocore/client.py", line 938, in _make_api_call
raise error_class(parsed_response, operation_name)
botocore.exceptions.ClientError: An error occurred (InvalidClientTokenId) when calling the GetQueueAttributes operation: The security token included in the request is invalid.
The credentials are correct, and my Cloud Admin insists that my credentials have these permissions.
If it helps, these are in my settings.py :
from urllib.parse import quote
CELERY_BROKER_URL = 'sqs://{access_key}:{secret_key}#'.format(
access_key=quote(env.str("AWS_ACCESS_KEY_ID"), safe=''),
secret_key=quote(env.str("AWS_SECRET_ACCESS_KEY"), safe=''),
)
CELERY_BROKER_TRANSPORT_OPTIONS = {
"region": "us-east-2",
"polling_interval": 60,
'sdb_persistence': False,
"predefined_queues":{
'myq': {
'url': 'https://sqs.us-east-2.amazonaws.com/164782647287/myq',
'access_key_id': env.str("AWS_ACCESS_KEY_ID"),
'secret_access_key': env.str("AWS_SECRET_ACCESS_KEY"),
},
}
}
CELERY_TASK_DEFAULT_QUEUE = 'myq'
I'm using the latest version of Celery and associated dependencies:
celery[sqs]==5.2.7