[keycloak-user] Public key for verifying JWT?

Im trying to verify a JWT access token from Keycloak using the python jose-jwt library, but cannot seem to get it to succeed. When using the HS512 algorithm, how does one retrieve the key needed to verify the JWT tokens? The JWT header decodes to something like this: {"alg":"HS512","typ" : "JWT","kid" : "eb31076b-bce6-495a-9a4b-e3210e14b342"}, but I don't see how to get the key associated with the given kid value above. I tried using the "client secret" from the credential section, but thats not working. What am I missing? thanks!