Remove credo and use mix format, and lint everything

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/eventos/actors/service/activation.ex

@@ -9,7 +9,12 @@ defmodule Eventos.Actors.Service.Activation do
   @doc false
   def check_confirmation_token(token) when is_binary(token) do
     with %User{} = user <- Repo.get_by(User, confirmation_token: token),
-    {:ok, %User{} = user} <- Actors.update_user(user, %{"confirmed_at" => DateTime.utc_now(), "confirmation_sent_at" => nil, "confirmation_token" => nil}) do
+         {:ok, %User{} = user} <-
+           Actors.update_user(user, %{
+             "confirmed_at" => DateTime.utc_now(),
+             "confirmation_sent_at" => nil,
+             "confirmation_token" => nil
+           }) do
       {:ok, Repo.preload(user, :actors)}
     else
       _err ->