Finally finished the massive refactor... transitions still broke but it's fine for now.

private/database/queries/create/CreateTeamUsersSeasonsTable.sql

@@ -0,0 +1,7 @@
+CREATE TABLE IF NOT EXISTS "TeamUsersSeasons" (
+  "teamId" BIGSERIAL NOT NULL,
+  "userId" BIGSERIAL NOT NULL,
+  "seasonId" BIGSERIAL NOT NULL,
+  "registered" TIMESTAMP NOT NULL,
+  PRIMARY KEY("teamId", "userId", "seasonId")
+);