After "mix phx.gen.auth Admins Admin admins" with added working register and login path.

lib/beet_round_server_web/controllers/admin_settings_controller.ex

@@ -0,0 +1,77 @@
+defmodule BeetRoundServerWeb.AdminSettingsController do
+  use BeetRoundServerWeb, :controller
+
+  alias BeetRoundServer.Admins
+  alias BeetRoundServerWeb.AdminAuth
+
+  import BeetRoundServerWeb.AdminAuth, only: [require_sudo_mode: 2]
+
+  plug :require_sudo_mode
+  plug :assign_email_and_password_changesets
+
+  def edit(conn, _params) do
+    render(conn, :edit)
+  end
+
+  def update(conn, %{"action" => "update_email"} = params) do
+    %{"admin" => admin_params} = params
+    admin = conn.assigns.current_scope.admin
+
+    case Admins.change_admin_email(admin, admin_params) do
+      %{valid?: true} = changeset ->
+        Admins.deliver_admin_update_email_instructions(
+          Ecto.Changeset.apply_action!(changeset, :insert),
+          admin.email,
+          &url(~p"/admins/settings/confirm-email/#{&1}")
+        )
+
+        conn
+        |> put_flash(
+          :info,
+          "A link to confirm your email change has been sent to the new address."
+        )
+        |> redirect(to: ~p"/admins/settings")
+
+      changeset ->
+        render(conn, :edit, email_changeset: %{changeset | action: :insert})
+    end
+  end
+
+  def update(conn, %{"action" => "update_password"} = params) do
+    %{"admin" => admin_params} = params
+    admin = conn.assigns.current_scope.admin
+
+    case Admins.update_admin_password(admin, admin_params) do
+      {:ok, {admin, _}} ->
+        conn
+        |> put_flash(:info, "Password updated successfully.")
+        |> put_session(:admin_return_to, ~p"/admins/settings")
+        |> AdminAuth.log_in_admin(admin)
+
+      {:error, changeset} ->
+        render(conn, :edit, password_changeset: changeset)
+    end
+  end
+
+  def confirm_email(conn, %{"token" => token}) do
+    case Admins.update_admin_email(conn.assigns.current_scope.admin, token) do
+      {:ok, _admin} ->
+        conn
+        |> put_flash(:info, "Email changed successfully.")
+        |> redirect(to: ~p"/admins/settings")
+
+      {:error, _} ->
+        conn
+        |> put_flash(:error, "Email change link is invalid or it has expired.")
+        |> redirect(to: ~p"/admins/settings")
+    end
+  end
+
+  defp assign_email_and_password_changesets(conn, _opts) do
+    admin = conn.assigns.current_scope.admin
+
+    conn
+    |> assign(:email_changeset, Admins.change_admin_email(admin))
+    |> assign(:password_changeset, Admins.change_admin_password(admin))
+  end
+end