Fix user_id functionality (#2548)

mem0/configs/base.py

@@ -6,9 +6,12 @@ from pydantic import BaseModel, Field
 from mem0.embeddings.configs import EmbedderConfig
 from mem0.graphs.configs import GraphStoreConfig
 from mem0.llms.configs import LlmConfig
-from mem0.memory.setup import mem0_dir
 from mem0.vector_stores.configs import VectorStoreConfig
 
+# Set up the directory path
+home_dir = os.path.expanduser("~")
+mem0_dir = os.environ.get("MEM0_DIR") or os.path.join(home_dir, ".mem0")
+
 
 class MemoryItem(BaseModel):
     id: str = Field(..., description="The unique identifier for the text data")