Account id fetching in aps package? How to get accountid of a customer into the configure section of the package? | Learning Curve- Perfect Tutorial for the beginers

use the below api call to fetch the accountid

$xml = '<methodCall>
<methodName>pem.getSubscription</methodName>
<params>
<param>
<value>
<struct>
<member>
<name>subscription_id</name>
<value>
<int>'.$subscriptionid.'</int>
</value>
</member>	
<member>
<name>get_resources</name>
<value>
<boolean>1</boolean>
</value>
</member>			               
</struct>
</value>
</param>
</params>
</methodCall>';

$xml = '<methodCall>

<methodName>pem.getSubscription</methodName>

<param>

<value>

<name>subscription_id</name>

<value>

<int>'.$subscriptionid.'</int>

</value>

</member>

<name>get_resources</name>

<value>

</value>

</member>

</struct>

</value>

</param>

</params>

</methodCall>';