From your Account Dashboard, click on the navigation tab labelled 🗝 API-KEYs.
From there, you may click on Add to create a new key and give a name to your project. Each BscScan account is limited to creating 3 keys at any one time.
To change your project name associated with an API Key, click on Edit to specify a new App Name, and save the changes.
If you would like to delete an API Key or suspect your key has been compromised, you may click on Remove to delete that key and generate a new one.