Check if user is a member of a group hub

Hi everyone, I'm currently trying to create a component which will check if a user is a member of a group hub and then if they are, display something on a page. I keep using the LiQL from https://developer.khoros.com/khoroscommunitydevdocs/docs/membership-liql-examples, but for almost each one, I get an "invalid query syntax" error. Does anyone what might be the cause?

Here is the code I'm using:

<#assign apiVersion = "2.0"/>

<#assign liql_query = "SELECT join_date, title FROM nodes WHERE user.id = '" + user.id + "' "/>
${liql_query}

<#assign users= rest(apiVersion, "/search?q=" + liql_query?url + "&restapi.response_style=view") />

<br>${users.status}
<br>${users.message}

I've also tried the following queries, but same error (invalid query syntax):

SELECT id,login FROM users WHERE node.id = 'grouphub:EAP'

SELECT login, id, join_date FROM users WHERE node.id = '<node.type>:<node.id>'

<#assign liql_query = "SELECT * FROM roles WHERE users.id = '" + user.id + "' and node.id = 'grouphub:EAP'"/>

I can't for the life of me figure out what is wrong with the queries. I would appreciate the help!