How to change logged in user password in WSO2 Carbon based products

If you need to call user admin service and perform this operation you can use following information.
Service URL
https://sanjeewa-ThinkPad-T530:9443/services/UserAdmin

PayLoad

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
xmlns:xsd="http://org.apache.axis2/xsd">
   <soapenv:Header/>
   <soapenv:Body>
      <xsd:changePasswordByUser>
         <xsd:oldPassword>testsanjeewa</xsd:oldPassword>
         <xsd:newPassword>sanjeewa</xsd:newPassword>
      </xsd:changePasswordByUser>
   </soapenv:Body>
</soapenv:Envelope>

Other possible solution is change password from management console user interface.
Visit following URL https://10.100.1.65:9443/carbon And go to change password window.
Home > Configure > Users and Roles > Change Password