title: PGconn.connect .... where is disconnect?
body: <p><strong>Environment:</strong></p>
  
  <p>psql (PostgreSQL) 9.6.3
  Rails 5.1.1
  Ruby 2.4.1p111</p>
  
  <p><strong>Question:</strong></p>
  
  <p>I may have a large group of (Devise) users each of whom is a separate Postgres user, e.g. SomePostgresRole01, SomePostgresRole02, etc.</p>
  
  <p>I can successfully do:</p>
  
  <pre><code>conn = PGconn.connect("localhost", 5432,"","","db_development","SomePostgresRole01","SomePassword")
  </code></pre>
  
  <p>I cannot find a conn.disconnect method.  Does such functionality exist?</p>