settings.xml

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
  <servers>
    <server>
      <id>ossrh</id>
      <username>${env.CI_DEPLOY_USERNAME}</username>
      <password>${env.CI_DEPLOY_PASSWORD}</password>
    </server>
  </servers>
  <profiles>
    <profile>
      <id>gpg</id>
      <properties>
        <!-- Optionally specify a different path and name for the gpg executable
              if it differs from the default of "gpg"
        <gpg.executable>gpg2</gpg.executable>
        -->
        <gpg.keyname>${env.GPG_KEY_ID}</gpg.keyname>
        <gpg.passphrase>${env.GPG_KEY_PASSPHRASE}</gpg.passphrase>
      </properties>
    </profile>
  </profiles>
</settings>