[keycloak-user] Custom (Moderated) Self Registration Flow

Hi, I am fairly new to Keycloak and evaluating it for our organisation. For our system, I would like to enable self-registration; but to customise the self registration flow. (I have seen this requirement named “moderated registration” in other products/discussions). For example, when a user signs up, - They should initially be blocked (or if not, they just won’t have any roles/permissions assigned); - An email should be sentl to administrator(s) informing them of the signup - Within the email provide a link to “confirm access” (or the link would add user to a group) Any hints as to how I might go about this? I can see that SPIs and/or “Script Execution” within a new registration flow might help. Or do I need to build a custom registration application using the API? Regards, Adam.