Below are the details on how to aquire the API access token and credential from the above platforms.

To successfully import orders and their items, ensure the Shopify SKU field for each product matches the item number in your mini-WMS app.
Shopify Integration Requires:
Steps to create the access token: Log in to Shopify Admin: Go to your Shopify store admin panel.
Navigate to Apps: In the left-hand menu, click on Apps.
Develop Apps: Click on Apps and sales channel settings. A new page will open. Click on Develop Apps and choose to allow custom apps.
Create New App: Click on the Create an App button and enter the app name.
Configure API Scopes: Select the following permissions:
Customer read only. Fulfillment read only. Orders read only. Install the App: Once configured, click Save. After saving, click Install app and confirm the installation if prompted.
Generate API Access Token: After installation, go to the API credentials section. Click Reveal token once to view your Admin API access token. Copy this token and use it in the Setup → Systemctrl screen of your app.
Store the Token Securely: Make sure to store the access token securely as it provides access to your Shopify store. This is a one-time process and does not need to be repeated.
To successfully import orders and their items, ensure the Amazon SellerSKU field for each product matches the item number in your mini-WMS app.
Register on Seller Central:
For the UK, visit https://sellercentral.amazon.co.uk.
Navigate to Apps & Services:
In the top-left menu, select Apps & Services and choose Develop Apps.
Complete Your Profile:
Fill in all required information and answer all questions. Answer Yes for all security-related Yes/No questions.
Add a New App Client:
Once approved, click Add new app client, provide a name, and specify what you want to access. Answer No to the “Restricted Data Token” question.
Retrieve LWA Credentials:
Click on LWA Credentials, and copy the Client Identifier and Client Secret.
Retrieve Refresh Token:
Once authorized, a Refresh Token will appear. Copy and store it securely.
Use the Correct Marketplace ID:
Ensure you select the appropriate Marketplace ID for the country you are operating in.
To successfully import orders and their items from your Ebay shop, ensure the eBay SKU field for each product matches the item number in your mini-WMS app.
Log in to eBay Developer Program:
Visit the eBay Developer Program and sign in with your eBay account.
Create or Select an eBay Application:
Navigate to the Dashboard, and either create a new application or select an existing one.
The OAuth token is short-lived and valid for approximately one hour.
To streamline the process: