title: Flyway migrations: [WARNING] Unable to restore connection to having no default schema
body: <p>I'm encountering a warning when running my migrations and I don't understand what the message means.</p>
  
  <p>The message is: [WARNING] Unable to restore connection to having no default schema: Access denied for user ''@'%' to database ''</p>
  
  <p>My migrations appear to be running correctly, so I know my DB connection is ok.</p>
  
  <p>What is the significance of "having no default schema" in this message?</p>