How to get a role UID?

omygoodness

UID is something for lithium internal use, they do not expose them. Normal id will work here but it seems you are using a role id which does not exist.

You can get all the role using below API

http://community.lithium.com/community-name/restapi/vc/roles

Check if the ID you are using exists or not. 

Here is the call to add a role

<#assign addRole = restadmin("/roles/id/${roleID}/users/add?role.user=id/${user.id}") />

VikasB Role exists but I am trying to send post request with jquery and it didnt work with ID so I used role name instead and it is working now :)

$.post('/restapi/vc/roles/name/RoleName/users/add?role.user=id/47')
  .done(function( data) {
    console.log(data);
  });

I will try to use call in freemarker. Hope it will work 

omygoodness

I agree that role exists but the ID you were using does not exist. It gives the error "No role with the specified uid" when the role id does not exist. See here

It would work with the ID also (See here) only if you are login with an admin account otherwise it will return the below response either you are using role id or role name.  Even the rest call will return the same response in freemarker. 

<response status="error">
  <error code="303">
    <message>
      User -1 does not have the following permission(s) at ecohaus: [ allow_analytics, allow_access_metrics ]
    </message>
  </error>
</response>

So you must use restadmin call to add the role. You can use endpoint to hit the restadmin call.