I have something like below in my application.ex

children = [
  {Goth, name: MyApp.Goth},
  MyApp.SomeService,
  MyApp.Endpoint
]

opts = [strategy: :one_for_one, name: MyApp.Supervisor]
Supervisor.start_link(children, opts)

SomeService looks like this:

defmodule MyApp.SomeService do
  use GenServer

  def start_link(opts \\ []) do
    GenServer.start_link(__MODULE__, opts)
  end

  def init(args) do
    {:ok, _} = Application.ensure_all_started(:goth)
    with token <- Goth.fetch!(MyApp.Goth) do
      # Use token, i.e. use it to fetch stuff from Google Cloud Secret Manager
    end

    {:ok, args}
  end
end

With the code above I get this error:

** (Mix) Could not start application myapp: exited in: MyApp.Application.start(:normal, [])
    ** (EXIT) exited in: GenServer.call({:via, Registry, {Goth.Registry, MyApp.Goth}}, :fetch, 5000)
        ** (EXIT) no process: the process is not alive or there's no process currently associated with the given name, possibly because its application isn't started

Is the call to Application.ensure_all_started not enough. Am I using goth and supervisor wrongly?