fix(client): loosen auth header validation

Author: stainless-app[bot]

src/finch/_client.py

@@ -239,14 +239,7 @@ def default_headers(self) -> dict[str, str | Omit]:
 
     @override
     def _validate_headers(self, headers: Headers, custom_headers: Headers) -> None:
-        if self.access_token and headers.get("Authorization"):
-            return
-        if isinstance(custom_headers.get("Authorization"), Omit):
-            return
-
-        if self.client_id and self.client_secret and headers.get("Authorization"):
-            return
-        if isinstance(custom_headers.get("Authorization"), Omit):
+        if headers.get("Authorization") or isinstance(custom_headers.get("Authorization"), Omit):
             return
 
         raise TypeError(
@@ -589,14 +582,7 @@ def default_headers(self) -> dict[str, str | Omit]:
 
     @override
     def _validate_headers(self, headers: Headers, custom_headers: Headers) -> None:
-        if self.access_token and headers.get("Authorization"):
-            return
-        if isinstance(custom_headers.get("Authorization"), Omit):
-            return
-
-        if self.client_id and self.client_secret and headers.get("Authorization"):
-            return
-        if isinstance(custom_headers.get("Authorization"), Omit):
+        if headers.get("Authorization") or isinstance(custom_headers.get("Authorization"), Omit):
             return
 
         raise TypeError(