Added missing import

api.py

@@ -1,6 +1,7 @@
 from fastapi import FastAPI, HTTPException, Path, Query, Depends, status, Body, Request
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import StreamingResponse
+from fastapi.encoders import jsonable_encoder
 from pydantic import BaseModel, Field, EmailStr, validator, field_validator
 from typing import List, Optional, Dict
 from datetime import date, datetime