Update app.py

app.py

@@ -38,6 +38,7 @@ torch.set_float32_matmul_precision("highest")
 # Load Hugging Face token if needed
 hf_token = os.getenv("HF_TOKEN")
 openai_api_key = os.getenv("OPENAI_API_KEY")
+client = OpenAI(api_key=openai_api_key)
 
 system_prompt_t2v_path = "assets/system_prompt_t2v.txt"
 system_prompt_i2v_path = "assets/system_prompt_i2v.txt"