Enter the API keys and Merchant ID from the Account > My User > API Keys, Tokenization Keys, Encryption Keys > View Authorizations page in your <a href="https://www.braintreegateway.com/" target="_blank">Braintree Account</a>.<br />
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If you wish to enable PayPal support, please <a href="https://articles.braintreepayments.com/guides/paypal/setup-guide#enter-your-paypal-credentials-in-the-braintree-control-panel" target="_blank">follow the instructions</a>.