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Will you be able to guide me through this?

So the s3 state login will use the environmental aws auth (normally AWS_PROFILE), while the eks creation will default to that but you can also set it explicitly in stack configuration so you probably just want to make sure to use `pulumi config set aws:region` and `aws:profile`

```import pulumi
import pulumi_eks as eks
from pulumi import automation as auto
import pulumi_aws as aws


backend_credentials = {
    "AWS_ACCESS_KEY_ID": "abc",
    "AWS_SECRET_ACCESS_KEY": "pqr",
    "AWS_REGION": "us-east-1",
    "AWS_SESSION_TOKEN": "some-session-token",
    "PULUMI_CONFIG_PASSPHRASE": ""
}

stack_credential = {
    "region": "us-west-2",
    "access_key": "def",
    "secret_key": "stu",
    "token": "some-session-token-again"
}


def pulumi_program():
    provider = aws.Provider(
        "eks_provider",
        aws.ProviderArgs(
            **stack_credential
        )
    )

    cluster = eks.Cluster(
        'eks-cluster',
        vpc_id="some-vpc",
        public_subnet_ids=["subnet-1", "subnet-2"],
        public_access_cidrs=['0.0.0.0/0'],
        desired_capacity=2,
        min_size=2,
        max_size=2,
        instance_type='t3.micro',
        storage_classes={"gp2": eks.StorageClassArgs(
            type='gp2', allow_volume_expansion=True, default=True, encrypted=True)},
        opts=pulumi.ResourceOptions(provider=provider)
    )
    pulumi.export("kubeconfig", cluster.kubeconfig)


stack = auto.create_stack(
            stack_name="TestStack",
            project_name="TestProject",
            program=pulumi_program(),
            opts=auto.LocalWorkspaceOptions(
                project_settings=auto.ProjectSettings(
                    name="TestProject",
                    runtime="python",
                    backend=auto.ProjectBackend(
                        url="<s3://some-bucket>"
                    ),
                ),
                env_vars=backend_credentials
                ),
            )

stack.refresh(on_output=print)
stack.up(on_output=print, color="always")```

I tried the above approach and getting error even though I am creating a fresh stack
stderr: error: the stack is currently locked by 1 lock(s). Either wait for the other process(es) to end or delete the lock file with `pulumi cancel`.

<s3://some-bucket/TestPulumiPOC/.pulumi/locks/Dev/f4bb019a-95a7-4359-ba09-7f3e21fe5533.json> : created by amrish@my_book (pid 61199) at 2022-10-01T23:03:05-04:00

Stack locks are by name for the filestate, `pulumi cancel` should delete it. The automation code looks like what I would expect.