## Console logger module
defmodule MyProject.ConsoleLogger do
  def format(level, message, timestamp, metadata) do
    {date, time} = timestamp

    date = date |> Date.from_erl!()
    time = time |> Tuple.delete_at(3) |> Time.from_erl!()

    module_name =
      metadata[:module] |> to_string() |> String.split(".") |> List.delete_at(0) |> Enum.join(".")

    "#{date} #{time} [#{module_name}] [#{level}] #{message}\n"
  rescue
    _e ->
      "could not format: #{inspect({level, message, metadata})}"
  end
end


## config/config.exs
config :logger, :console, format: {MyProject.ConsoleLogger, :format}, metadata: [:module]