settings.xml

<settings>
  <profiles>
    <profile>
      <id>profile-id</id>
      <repositories>
        <repository>
          <id>datomic-cloud</id>
          <name>datomic-cloud</name>
          <url>s3://datomic-releases-1fc2183a/maven/releases</url>
        </repository>
      </repositories>
    </profile>
  </profiles>
  <servers>
    <server>
      <id>datomic-cloud</id>
      <username>AWS_USER</username>
      <password>AWS_PASSWORD</password>
    </server>
  </servers>
  <activeProfiles>
    <activeProfile>profile-id</activeProfile>
  </activeProfiles>
</settings>