add username field, make it main log-in method

lib/pokemon_couture_web/controllers/user_confirmation_controller.ex

@@ -7,8 +7,8 @@ defmodule PokemonCoutureWeb.UserConfirmationController do
     render(conn, "new.html")
   end
 
-  def create(conn, %{"user" => %{"email" => email}}) do
-    if user = Accounts.get_user_by_email(email) do
+  def create(conn, %{"user" => %{"username" => username}}) do
+    if user = Accounts.get_user_by_username(username) do
       Accounts.deliver_user_confirmation_instructions(
         user,
         &Routes.user_confirmation_url(conn, :confirm, &1)

lib/pokemon_couture_web/controllers/user_reset_password_controller.ex

@@ -9,8 +9,8 @@ defmodule PokemonCoutureWeb.UserResetPasswordController do
     render(conn, "new.html")
   end
 
-  def create(conn, %{"user" => %{"email" => email}}) do
-    if user = Accounts.get_user_by_email(email) do
+  def create(conn, %{"user" => %{"username" => username}}) do
+    if user = Accounts.get_user_by_username(username) do
       Accounts.deliver_user_reset_password_instructions(
         user,
         &Routes.user_reset_password_url(conn, :edit, &1)

lib/pokemon_couture_web/controllers/user_session_controller.ex

@@ -9,12 +9,12 @@ defmodule PokemonCoutureWeb.UserSessionController do
   end
 
   def create(conn, %{"user" => user_params}) do
-    %{"email" => email, "password" => password} = user_params
+    %{"username" => username, "password" => password} = user_params
 
-    if user = Accounts.get_user_by_email_and_password(email, password) do
+    if user = Accounts.get_user_by_username_and_password(username, password) do
       UserAuth.log_in_user(conn, user, user_params)
     else
-      render(conn, "new.html", error_message: "Invalid email or password")
+      render(conn, "new.html", error_message: "Invalid username or password")
     end
   end