Vault for Upstream Static Basic Auth

Hello! Fairly new to Kong, excited to start really digging in. We have many microservices that are protected by basic auth. We plan on using Vault to store the basic auth creds. After reading the Vault plugin documentation, it doesn’t appear that the plugin itself can support this. Would this pattern need to be accomplished via custom plugin or a serverless function? Or is there more to the Vault plugin?

Thanks in advance!