Change models, new migrations, fix front and make tests work

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

lib/eventos_web/views/user_session_view.ex

@@ -0,0 +1,7 @@
+defmodule EventosWeb.UserSessionView do
+  use EventosWeb, :view
+
+  def render("token.json", %{token: token, user: user}) do
+    %{token: token, user: render_one(user, EventosWeb.UserView, "user_simple.json")}
+  end
+end