How to add multiple filtertype to discovery search

[I&P CRAI URosario]

Hi! Right now we have a custom service that display all the works in which a person is author through an id (Authority column, URL is /discover?filtertype=author&filter_relational_operator=authority&filter=123456789) but we also want to include the resources in which that person is Advisor we have tried

'/discover?filtertype=author'

'/discover?filtertype=author,advisor'

'/discover?filtertype=author&filtertype=advisor'

'/discover?filtertype=author|advisor'

But none have worked, can anyone give me a tip on how I can achive this?