Introduce basic user and profile management

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

priv/repo/migrations/20200612155254_add_disabled_parameter_to_users.exs

@@ -0,0 +1,9 @@
+defmodule Mobilizon.Storage.Repo.Migrations.AddDisabledParameterToUsers do
+  use Ecto.Migration
+
+  def change do
+    alter table(:users) do
+      add(:disabled, :boolean, default: false, null: false)
+    end
+  end
+end