title: An error has occurred: Error connecting to the server: FATAL: role "postgres" does not exist
body: <p>I have installed Postgres 9.5 version using entripeseDB in my Linux system.</p>
  
  <p>And connected to Postgres using pgadmin3 and created database and table.
  then I am able to get data from laravel php application.</p>
  
  <p>then my system shudown unexpectedly. </p>
  
  <p>On the restart  I am not able to connect the Postgres server.</p>
  
  <p>The error is:</p>
  
  <blockquote>
    <p>Error connecting to the server: FATAL:  role "postgres" does not exist.</p>
  </blockquote>
  
  <p>What could be the reasons for this? And how can I resolve this?</p>