title: db password leak to logs
body: <p>I configured Airflow metadata db as MySQL.</p>
  
  <pre><code> sql_alchemy_conn = sqla+mysql://airflow:airflow@localhost:3306/airflow
  </code></pre>
  
  <p>After that I used <code>initdb</code> command:</p>
  
  <pre><code>airflow initdb
  </code></pre>
  
  <p>Tables in the airflow db have been created.</p>
  
  <p>Then I runed command:</p>
  
  <pre><code>airflow shceduler
  airflow webserver -p 8080
  </code></pre>
  
  <p>in logs:</p>
  
  <pre><code>[2020-01-14 18:39:03,457: INFO/MainProcess] Connected to sqla+mysql://airflow:airflow@localhost:3306/airflow
  </code></pre>
  
  <p>password as plain text.</p>
  
  <p>How can I turn off that? Is sql_alchemy log? It's password leak to logs.</p>