chore: adding user creation tests

backend/src/__tests__/utils/database.ts

@@ -0,0 +1,11 @@
+import database from "../../database";
+
+const truncate = async (): Promise<void> => {
+  await database.sync({ force: true });
+};
+
+const disconnect = async (): Promise<void> => {
+  return database.connectionManager.close();
+};
+
+export { truncate, disconnect };