added migration

prisma/migrations/20210615140247_added_selected_calendar/migration.sql

@@ -0,0 +1,11 @@
+-- CreateTable
+CREATE TABLE "SelectedCalendar" (
+    "userId" INTEGER NOT NULL,
+    "integration" TEXT NOT NULL,
+    "externalId" TEXT NOT NULL,
+
+    PRIMARY KEY ("userId","integration","externalId")
+);
+
+-- AddForeignKey
+ALTER TABLE "SelectedCalendar" ADD FOREIGN KEY ("userId") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;