Andrii Mishchenko

If you want to get it fixed, you may modify omniauth_callbacks_controller.rb and check if Current.user has any twitter accounts associated. If not, you have to create an entry in TwitterAccount table with Current.user[:id]. Looks like this:

class OmniauthCallbacksController < ApplicationController
    before_action :require_user_logged_in!
    def twitter
        if Current.user.twitter_accounts.any?

            twitter_account = Current.user.twitter_accounts.where(username: auth.info.nickname).first_or_initialize
            twitter_account.update(
                name:auth.info.name,
                username: auth.info.nickname,
                image: auth.info.image,
                token: auth.credentials.token,
                secret: auth.credentials.secret,
                )
            redirect_to twitter_accounts_path, notice: "Conta do twitter conectada com sucesso!"
        else # If there is no twitter account associated

            TwitterAccount.create(user_id: Current.user[:id],username: auth.info.nickname, name:auth.info.name,
                image: auth.info.image,
                token: auth.credentials.token,
                secret: auth.credentials.secret, ) 
            redirect_to twitter_accounts_path, notice: "Conta do twitter conectada com sucesso!"
        end

    end
    def auth
        request.env["omniauth.auth"]
    end
end