freeswitch/conf/vanilla/autoload_configs/sms_flowroute.conf.xml

<configuration name="sms_flowroute.conf" description="SMS_FLOWROUTE send configs">
  <profiles>
    <profile name="default">
      <params>
	<param name="host" value="https://api.flowroute.com/v2/messages"/>
	<param name="debug" value="1"/>
	<param name="port" value="8090"/>
	<param name="access-key" value="ACCESS-KEY"/>
	<param name="secret-key" value="SECRET-KEY"/>
      </params>
    </profile>
  </profiles>
</configuration>