Insufficient Balance Error When Using Deepseek API Key

openai.APIStatusError: Error code: 402 - {'error': {'message': 'Insufficient Balance', 'type': 'unknown_error', 'param': None, 'code': 'invalid_request_error'}}

from llama_index.llms.deepseek import DeepSeek

# Set up the DeepSeek class with the required model and API key

llm = DeepSeek(model="deepseek-chat", api_key="******************")

# Call the complete method with a query
response = llm.complete("Explain the importance of low latency LLMs")

print(f'Response: {response}')