How to Generate a Magento Access Token?

Follow the below steps:
1. Login to Magento admin dashboard.
2. In the Menu on the left, select "System".
3. Click on "Integration".
4. Click on "Add new Integration".
5. Click on "API" and select "Resource access" as "All" from the dropdown.
6. Click on Integration info and Enter Name and Password (admin password).
7. On the right, select "Save & Activate" from the saving button dropdown.
8. Click on "Allow".
9. You will get four values in the last page, copy the "Access token"(Not "Access token secret") value and paste in the input box.

 How to Generate Wordpress Consumer Key and Consumer Secret?

Follow the below steps:
1. Login to the Woocommerce admin dashboard.
2. In the menu on the left, click on Woocommerce and then settings
3. Click on Advanced Tab on the settings page.
4. Click on "REST API" button and then click on 'Add key"
5. In key details give any 'Description' and set Permission-->>Read
6. Click on "Generate API Key
7. Copy Consumer Key and Consumer Secret

 How to Generate a Shopify Access Token?

Follow the below steps:
1. Log-in to your Shopify dashboard.
2. In the menu on the left, select "Apps"
3. Click on "Manage private Apps"
4. Click on "Create new private apps".
5. In the description section of the form that displays, give a name to the private app.
6. In the admin API section to this form, click on "Review disabled Admin API Permissions"
7. In the drop-down menu which is displayed, look for "Script tags in your store's theme template files".and against it, Change "No Access" To read and write". Also, look for "Product Information", and against it, change "No Access" to "Read ".
8. In the Storefront API section of this Form, check on "Allow this app to access your storefront data using the storefront API".
9. Click on "save".
10. In the Admin API section of the page that displays an"Example URL" will be displayed. this is your "Web API Key".