title: What is the default Username and Password for ElasticSearch 7.2.0 (when x-pack enabled)?
body: <p>I did the change in <code>config/elasticsearch.yml</code> to</p>
  
  <pre><code>xpack.security.enabled: true
  </code></pre>
  
  <p>And now after starting elasticsearch (<code>./bin/elasticsearch</code>) and then do:
  <code>curl localhost:9200</code></p>
  
  <p>getting:</p>
  
  <pre><code>{"error":{"root_cause":[{"type":"security_exception","reason":"missing authentication credentials for REST request [/]","header":{"WWW-Authenticate":"Basic realm=\"security\" charset=\"UTF-8\""}}],"type":"security_exception","reason":"missing authentication credentials for REST request [/]","header":{"WWW-Authenticate":"Basic realm=\"security\" charset=\"UTF-8\""}},"status":401}
  </code></pre>
  
  <p>Then tried these 2:</p>
  
  <pre><code>curl localhost:9200 -u elastic:elastic
  curl localhost:9200 -u elastic:changeme
  </code></pre>
  
  <p>getting:</p>
  
  <pre><code>{"error":{"root_cause":[{"type":"security_exception","reason":"failed to authenticate user [elastic]",
  "header":{"WWW-Authenticate":"Basic realm=\"security\" charset=\"UTF-8\""}}], "type":"security_exception", "reason":"failed to authenticate user [elastic]","header":{"WWW-Authenticate":"Basic realm=\"security\" charset=\"UTF-8\""}},"status":401}%
  </code></pre>
  
  <p>What is the default username/password for Elasticsearch 7.2.0?</p>