void IInternalKmsCredentials.SetCredentials(MongoCryptSafeHandle handle, Status status)
        {
            unsafe
            {
                fixed(byte *p = Key)
                {
                    IntPtr ptr = (IntPtr)p;

                    using (PinnedBinary pinned = new PinnedBinary(ptr, (uint)Key.Length))
                    {
                        handle.Check(status, Library.mongocrypt_setopt_kms_provider_local(handle, pinned.Handle));
                    }
                }
            }
        }