chore: hide ok from non crate users

Author: arihant2math

crates/client/src/api_error.rs

@@ -2,7 +2,7 @@ use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct APIError {
-    pub ok: bool,
+    pub(crate) ok: bool,
     pub error: String,
 }