Veo-accounts receives external events using AMQP.
When the client_change message with the type CREATION is received, veo-accounts creates a Keycloak group
called veo_client:{clientId} and sets the group attributes maxUsers & maxUnits with the corresponding values from
the message content.
When receiving a client DEACTIVATION, the veo client group is tagged with the attribute veo-accounts.deactivated and
all its members are removed from the veo-user group, so they are no longer able to authenticate with
other veo REST APIs.
ACTIVATION reverts the effects of DEACTIVATION, removing the veo-accounts.deactivated attribute from the veo client group and reassigning all its members to the veo-user group, so they can authenticate with other veo REST APIs again.
When receiving the client DELETION, veo-accounts deletes the veo client group and all its members from Keycloak.