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Hi all, I am trying to establish a long running agent as a service in ECS as described here: <https://docs.prefect.io/orchestration/agents/ecs.html#running-ecs-agent-in-production>. But struggling to authenticate my agent. Details in thread

My agent fails to start with the error: `prefect.utilities.exceptions.AuthorizationError: No agent API token provided.`
This is suprising me as I have set service API key in the task definition (with the actual key):
```"environment":
    {
        "name": "PREFECT__CLOUD__API_KEY",
        "value": "&lt;your-key&gt;"
    },```
As a work around I tried providing the key as an argument to the container cmd:

`"command": ["prefect", "agent", "ecs", "start", "--key", "&lt;your-key&gt;"]`
But I am running into
```Usage: prefect agent ecs start [OPTIONS]
Try 'prefect agent ecs start -h' for help.
Error: no such option: --key```

<@ULVA73B9P> open “Docs on ECS Agent as a Service use --key on Prefect 0.14.13”

<https://github.com/PrefectHQ/prefect/issues/4877>

Hey <@U02BPTFLD6D>, key was added in 0.15.0 so can you try bumping your image up?

<@U01QEJ9PP53>, thank you so much! That was it.