How to create secure-deployment using CLI

Issue

• We want to secure EAP applications via adapter subsystem configuration. Reading the documentation the following stanza should be added to the keycloak-adapter-subsystem:

        <subsystem xmlns="urn:jboss:domain:keycloak:1.1">
           <secure-deployment name="WAR MODULE NAME.war">
              <realm>demo</realm>
              <auth-server-url>http://localhost:8081/auth</auth-server-url>
              <ssl-required>external</ssl-required>
              <resource>customer-portal</resource>
              <credential name="secret">password</credential>
           </secure-deployment>
        </subsystem>

• How can this be done using the CLI interface?
• JBoss EAP does not initialize when added to standalone.xml input <secure-deployment name="example.war"> with your tags.

Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[304,12]
Message: JBAS014789: Unexpected element '{urn:jboss:domain:1.4}secure-deployment' encountered