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I am running my flows in DockerAgent, the image I want to use is in private gitlab registry, how can I specify username and token required to pull the image ?

<@U02JPHYGCFN> you could try passing it as environment variables either on:
#1 Run configuration
```flow.run_config = DockerRun(
    env={"SOME_VAR": "VALUE"},
    image="example/image-name:with-tag"
)```
#2 or on the agent
```prefect agent docker start --env KEY=value```

probably #2 is better because the agent is pulling the image when deploying a flow, afaik

ok, what would be the name of these environment variables ? when I pull manually I do `docker login` and then do `docker pull`

Looks like you need to authenticate your agent like this
```before_script:
  - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY```
As per
```<https://docs.gitlab.com/ee/user/packages/container_registry/>```
So that it can just `docker pull`

i don't see any option here - <https://docs.prefect.io/api/latest/cli/agent.html#docker-start>

You do on the agent machine before you spin the agent because the agent just uses the underlying `docker pull` . So you would authenticate the agent.

yes thats what I am doing now, i thought the prefect docker agent has some option to do this.. looks like there is not

Been looking and yeah I guess Gitlab doesn’t have a way to authenticate with environment variables. That was the initial suggestion cuz AWS and GCP provide such ways