Magento 2 integration on a password protected staging site

Hi,

I have my staging site under password protection. When I try to activate OAuth from Magento 2, I get the error “Klaviyo is unable to connect to Magento Server for OAuth Handshake. Please ensure that both /oauth/token/request and /oauth/token/access are accessible. “

Of course the mentioned urls are not accessible because of password protection. How can I pass the username and password for this urls so it is accessible for Klaviyo without removing the password protection from my staging site.

I have set “Allow OAuth Access Tokens to be used as standalone Bearer tokens ” to “yes” under store->configuration->Service->OAuth->Consumer settings

I am using a test account on Klaviyo to test email templates.