[keycloak-user] gatekeeper and multiple realms per subdomain

I have a multi-tenant application that has a keycloak realm per subdomain. Is there a recommended way to configure keycloak-gatekeeper for such a setup? Is there an interface that I could implement to dynamically select a keycloak realm given the subdomain of the origin? Thanks, Director of Systems Architecture REPAY Telephone:404.637.1680 Customer Service: 877.607.5468 Email:cshuman@repay.com Web:www.repay.com This email message is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. ​