validate command: ability to create access token for first admin user

[uwedeportivo]

will be used for executing automated regression tests against k8s cluster.

you can use a script similar to the one below to create the first admin and let it spit out the token

validate_script.json:

{
  "firstAdmin": {
    "email": "foo@sourcegraph.com",
    "username": "foo",
    "password": "{{ .foo_pw}}",
    "createAccessToken": true
  }
}

you can run it like so:

EXPORT SRC_ENDPOINT=http://localhost:3080
src validate -context foo_pw=testtesttest validate_script.json

[davejrt]

Cool, maybe we could output this value to a file, so we can source it later so all the env vars are exported before we run any yarn commands.

[daxmc99]

Looking forward to using this on https://github.com/sourcegraph/sourcegraph/issues/13878