FIX: do not create new email token if there already exists a confirmed one

app/controllers/users/omniauth_callbacks_controller.rb

@@ -115,7 +115,7 @@ class Users::OmniauthCallbacksController < ApplicationController
     if @auth_result.email_valid && @auth_result.email == user.email
       user.update!(staged: false)
       # ensure there is an active email token
-      user.email_tokens.create(email: user.email) unless user.email_tokens.active.where(email: user.email).exists?
+      user.email_tokens.create(email: user.email) unless EmailToken.where(email: user.email, confirmed: true).present? || user.email_tokens.active.where(email: user.email).exists?
       user.activate
     end