Go to tiendanube.com and click on Access my panel.
Log in with your store account on Tiendanube.
Once inside your store panel, go to the left sidebar menu and select Settings.
In the Payment methods section, scroll down to find Ecart Pay.
Click the Activate button.
Accept the terms to integrate Ecart Pay with Tiendanube by clicking Accept and start using.
Click Start setup.
Log in with your Ecart Pay account.
You will see your active session; make sure the email matches that of your store on Tiendanube.
Click Continue.
A notification will appear confirming that the integration was set up correctly.
Click Go to Tiendanube to return to your store panel.
In your Tiendanube panel, go back to Settings > Payment methods.
You will see that Ecart Pay is already installed and activated.