Getting the plugin up and running on your store is quite simple really. There are a few steps needed before you can start trading using wide range of payment methods offered by Fiuu.

Requirements

An active Shopify store account and admin access.
An active Fiuu merchant account. Your merchant account must have a card channel enabled. (It's also good having sandbox account in addition. But it's not required).
1. Merchant ID - your merchant account identifier
2. Secret Key - your merchant account validation credential

Installation Steps

First, head over to pending approval installation link.
If you are not already logged in as an administrator, you will be asked to log in first. Kindly log in to the store you wish to install the app.
Click on the "Install" button as per depicted below. <screenshot pending approval>
Read the description on the next page, and click "Install" whenever you are ready.
You will be redirected to the following page, asking for you to select your store country, Merchant ID and Secret Key. Select your desired country and fill up both fields.
If you are testing using sandbox Merchant ID and Secret Key, please make sure the Merchant ID begins with SB_ prefix and tick on the "Sandbox Mode"
Once ready, please click on the "Submit" button.
If everything is going as expected, you will receive this message:

This indicates that the installation process has done.

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Note
There are a lot of similarities between this integration and Fiuu's normal offsite payments integration. Particularly in the installation user experience.
This is expected because both extensions are sharing the same underlying framework. The only differentiating factor is how the extension handles payment request and responds to it.