core-it-suite/src/test/resources/mng-5771-core-extensions/settings-template-mirror-auth.xml

<settings>
  <servers>
    <server>
      <id>repoman</id>
      <username>maven</username>
      <password>secret</password>
    </server>
  </servers>

  <mirrors>
    <mirror>
      <id>repoman</id>
      <name>Mirror</name>
      <url>http://localhost:@port@</url>
      <mirrorOf>external:*</mirrorOf>
    </mirror>
  </mirrors>

  <profiles>
    <profile>
      <id>development</id>
      <repositories>
        <repository>
          <id>central</id>
          <url>http://central</url>
        </repository>
      </repositories>
      <pluginRepositories>
        <pluginRepository>
          <id>central</id>
          <url>http://central</url>
        </pluginRepository>
      </pluginRepositories>
    </profile>
  </profiles>

  <activeProfiles>
    <activeProfile>development</activeProfile>
  </activeProfiles>
</settings>