@Override
        public Connection getConnection(String username, String password) throws SQLException {
            Properties connectionProperties = new Properties(rootProperties);
            if (username != null) {
                connectionProperties.put("user", username);
                if (password != null) {
                    connectionProperties.put("password", password);
                }
            }
            return driver.connect(jdbcUri, connectionProperties);
        }
Sets the username and password.

@param user     The username. Can be null.
@param password The password. Can be null.
@return This object.
testing/src/main/java/org/jdbi/v3/testing/junit5/JdbiGenericExtension.java