1- Login to your Chargebee account

2- Go to Settings->Configure Chargebee

3- Scroll down to API Keys and Events and click on API keys

4- Copy Full-Access key

5- In core8 navigate to Configuration->Integrations

6- Click on Chargebee tile

7- Paste your API Key & Site Name. You can get the Site Name from URL e.g. if your URL is https://core8-test.chargebee.com/ then your Site Name is core8-test

8- Turn ON the toggle “Connect to Chargebee Sandbox account”

9- Click on Connect button and your are done