code: public Connection getConnection(String user, String password) throws SQLException {
      try {
        Connection con = DriverManager.getConnection(getUrl(), user, password);
        if (LOGGER.isLoggable(Level.FINE)) {
          LOGGER.log(Level.FINE, "Created a {0} for {1} at {2}",
              new Object[] {getDescription(), user, getUrl()});
        }
        return con;
      } catch (SQLException e) {
        LOGGER.log(Level.FINE, "Failed to create a {0} for {1} at {2}: {3}",
            new Object[] {getDescription(), user, getUrl(), e});
        throw e;
      }
    }
docs: Gets a connection to the PostgreSQL database. The database is identified by the DataSource
  properties serverName, databaseName, and portNumber. The user to connect as is identified by
  the arguments user and password, which override the DataSource properties by the same name.
  
  @param user     user
  @param password password
  @return A valid database connection.
  @throws SQLException Occurs when the database connection cannot be established.