Add basic auth for rpc server

src/libs/rpc_client.py

@@ -7,9 +7,29 @@ load_dotenv()
 
 rpc_server_url = os.getenv('CHATXBT_RPC_SERVER_URL')
 
-async def rpc_call(method_name, params: Optional[Union[dict, list]] = {}, url: str = rpc_server_url):
+async def rpc_call(
+    method_name: str,  # The name of the RPC method to be called
+    params: Optional[Union[dict, list]] = None,  # Optional parameters for the RPC method
+    url: str = rpc_server_url  # The URL of the RPC server
+) -> dict:  # Returns the JSON response from the RPC server
+    """
+    This function makes an RPC call to the specified URL with the given method name and parameters.
+
+    Args:
+        method_name (str): The name of the RPC method to be called.
+        params (Optional[Union[dict, list]], optional): Optional parameters for the RPC method. Defaults to None.
+        url (str, optional): The URL of the RPC server. Defaults to rpc_server_url.
+
+    Returns:
+        dict: The JSON response from the RPC server.
+
+    Raises:
+        httpx.RequestError: If an error occurs while making the RPC call.
+
+    """
     headers = {
         'Content-Type': 'application/json',
+        "Authorization": os.getenv('CHATXBT_RPC_SERVER_BASIC_AUTH_CREDENTIALS')
     }
 
     payload = {
@@ -26,4 +46,4 @@ async def rpc_call(method_name, params: Optional[Union[dict, list]] = {}, url: s
             return response.json()
     except httpx.RequestError as e:
         print(f"Error making RPC call: {e}")
-        return None
+        return None