Update crewai/agent.py

crewai/agent.py

@@ -69,6 +69,10 @@ class Agent(BaseModel):
     role: str = Field(description="Role of the agent")
     goal: str = Field(description="Objective of the agent")
     backstory: str = Field(description="Backstory of the agent")
+    api_key: str = Field(
+        default=os.getenv("OPENAI_API_KEY"),
+        description="API key for the language model.",
+    )
     llm: Optional[Any] = Field(
         default_factory=lambda: ChatOpenAI(
             temperature=0.7,