ISO27001 and SOC2 Type II certification requirements

Greetings!
We are using the User Switching plugin on our website at reputation.com. As part of our ISO27001 and SOC2 Type II certification requirements, we do an annual vendor risk assessment. We have a questionnaire for the owner/administrator of the User Switching plugin that we need completed in order to maintain our certification requirements. Who should I send this questionnaire to, along with supporting documentation?

Thank You
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