refactor: route market providers through data gateway

backend/data/providers/ifind.py

@@ -0,0 +1,11 @@
+from __future__ import annotations
+
+from ifind_client import IfindHttpClient
+
+
+class IfindProvider:
+    def __init__(self, client: IfindHttpClient) -> None:
+        self.client = client
+
+    def set_credentials(self, refresh_token: str, access_token: str = "") -> None:
+        self.client.set_credentials(refresh_token, access_token)