In gradle/gradle-build-action#933 the gradle configurations were enhanced to support a custom plugin repository provided by the user. These plugin repositories can require authentication but there is currently no mechanism to also provide a credentials block to this configuration.

It would be helpful if we could also provide a username and password to the custom plugin repository e.g.

  repositories {
    maven { 
      url "<private gradle plugin repository>
      credentials {
        username = System.getenv("USERNAME")
        password = System.getenv("PASSWORD")
      }
    }
  }