how many managers left sunshine stars?
CREATE TABLE "managerial_head_coach_changes" (
  "team" text,
  "outgoing_manager" text,
  "manner_of_departure" text,
  "date_of_vacancy" text,
  "incoming_manager" text,
  "date_of_appointment" text
);
SELECT COUNT("outgoing_manager") FROM "managerial_head_coach_changes" WHERE "team"='Sunshine Stars';