deprec warning

Author: esoteric-ephemera

mpcontribs-client/mpcontribs/client/__init__.py

@@ -889,6 +889,18 @@ def __init__(
             project (str): use this project for all operations (query, update, create, delete)
             session (requests.Session): override session for client to use
         """
+
+        logger.warning(
+            """The `mpcontribs-client` package has been deprecated in favor of the main Materials Project (MP) API client `mp-api`.
+To use the MP Contribs client swith up-to-date features, please `pip install 'mp-api[contribs]'`:
+```py
+from mp_api.client import MPRester
+
+with MPRester() as mpr:
+    mpr.contribs.query_contributions(...)
+```"""
+        )
+
         # NOTE bravado future doesn't work with concurrent.futures
         # - Kong forwards consumer headers when api-key used for auth
         # - forward consumer headers when connecting through localhost