Site users management - Models - User object

The below XML defines the elements and attributes of a user object. These are the common attributes of a user in both Collaborate and Publisher. 

<users>
        <user>
        <userid>102</userid>
        <userlink>https://localhost/R_4_1_4/api/2/users/102</userlink>
        <httplink>https://localhost/R_4_1_4/viewUserProfile.action?metaData.encryptTargetUserID=6nmQLN8jN8c=&metaData.updateUserProfileProcess=true</httplink>
        <httpavatar>https://localhost/R_4_1_4/downloadUserAvatar.action?user.userId=102&user.avatarWidth=48&user.lastModifiedTime=0</httpavatar>
        <avatar>https://localhost/R_4_1_4/api/2/users/102/avatar?size=48&lastmodifieddate=1495787935207</avatar>
        <name>
                 <firstname>user</firstname>
                 <lastname>name</lastname>
                 <goesby></goesby>
                 <title></title>
        </name>
        <externalid></externalid> {Optional element used when the user is being imported / linked from an external system}
        <email>user@domain.com</email>
        <phone>44156680000</phone>
        <jobtitle>Senior Solution Architect</jobtitle>
        <mobile>441561510000</mobile>
        <department>Development</department>
        <status>active</status>
        <organisation>
                      <orgname></orgname>
                      <orgid></orgid> {GUID ID of the organisation}
                      <orgaddressid></orgaddressid>       
       </organisation> {Not present in Collaborate, what to do in that case, also please note that we should have an organisation API to return the organisation details by giving the organisation name}
       <location>
              <addressline1>New London House</addressline1>
              <addressline2>6 London Street</addressline2>
              <city>London</city>
              <country>United Kingdom</country>
              <postCode>EC3R 7LP</postCode>
       </location>
      <The below elements are only present in Collaborate >
       <img>http://blog.newrelic.com/wp-content/uploads/java-logo.jpg</img>
     <sociallinks>
        <link>
            <name>LinkedIn</name>
            <value>http://www.linkin.com/tom.chick</value>
        </link>
    </sociallinks>
    <customlink>
         <link>
            <name>My Web</name>
            <value>http://www.mywebsite.com</value>
        </link>
    </customlink>
    <messaginglink>
        <link>
            <name>Skype</name>
            <value>tom.chick.skype</value>
        </link>
    </messaginglink>
          <secretaryname>time of india</secretaryname>
          <secretarymail>times@india.com</secretarymail>
          <bio>Development manager</bio>
          <sourcetype>AD</sourcetype>
          <specialities>java,dotNet</specialities>
           
        </user>
</users>