Using Odoo 10 Community

The Unsubscribe link built automatically using Mass Mail takes a subscriber to a page in Odoo that allows them to manage their subscriptions. This is working well.

I wish to add a link to this page in the Customer Portal so from inside "My Account" a customer can manage their subscriptions without having the click the unsubscribe in their emails necessarily.

Unless I've missed it, their doesn't seem to be a snippet available to perform this function. Therefore, I seeking to build the link myself by editing the My Portal view. (If I'm mistaken, please enlighten me)

The format I've established is <www.odooserver.com>/mail/mailing/22/unsubscribe?res_id=<ID>&db=<DBNAME>&email=<EMAIL Address>

The My Portal view already seems to select the partner object.  <t t-set="object" t-value="partner"/>

Can anyone provide the syntax to build a URL link using the database elements partner ID/email. The DBNAME I can hard code in this instance. Any help would be much appreciated.