KeyMatchGin determines whether key1 matches the pattern of key2 (similar to KeyMatch2 in Casbin).

RBAC with domain model for Casbin, supports evaluation of extra information - sub: user / role - ext: extra information - ext_rule: expression to evaluate extra information - dom: domain - obj: object, supports gin router key match (EX: /api/v1/user/:id/*any) - act: action, supports regex match (EX: GET | POST) - eft: effect Router key match will not work if keyMatchGin is not defined in the model.