.circleci.settings.xml

<settings>
  <servers>
    <server>
      <id>glowstone-upstream</id>
      <username>${env.MAVEN_USER}</username>
      <password>${env.MAVEN_KEY}</password>
    </server>
    <server>
      <id>glowstone-releases</id>
      <username>${env.MAVEN_USER}</username>
      <password>${env.MAVEN_KEY}</password>
    </server>
    <server>
      <id>glowstone-snapshots</id>
      <username>${env.MAVEN_USER}</username>
      <password>${env.MAVEN_KEY}</password>
    </server>
  </servers>
</settings>