Better error handling when accessing the Accessy API.

api/src/multiaccessy/accessy.py

@@ -465,7 +465,11 @@ def _get_json_paginated(self, url: str, msg: str | None = None) -> list[Any]:
 
     def get_user_details(self, user_id: UUID) -> AccessyUser:
         """Get details for user ID."""
-        return AccessyUser.from_dict(self._get_user_details(user_id))
+        json = self._get_user_details(user_id)
+        try:
+            return AccessyUser.from_dict(json)
+        except Exception as e:
+            raise AccessyError(f"Could not get user details for {user_id}. Could not deserialize {json} as an AccessyUser") from e
 
     ################################################
     # Methods that return raw JSON data from API:s