Improve error handling on request sending

src/errors.rs

@@ -19,6 +19,8 @@ custom_error! {
     InvalidFormBodyError{error_type: String, error:String} = "The server responded with: {error_type}: {error}",
     RateLimited = "Ratelimited.",
     MultipartCreationError{error: String} = "Got an error whilst creating the form: {}",
+    TokenExpired = "Token expired, invalid or not found.",
+    NoPermission = "You do not have the permissions needed to perform this action.",
 }
 
 custom_error! {

src/limit.rs

@@ -98,9 +98,15 @@ impl LimitedRequester {
                 user_rate_limits,
             );
             if !response.status().is_success() {
-                Err(InstanceServerError::ReceivedErrorCodeError {
+                match response.status().as_u16() {
+                    401 => return Err(InstanceServerError::TokenExpired),
+                    403 => return Err(InstanceServerError::TokenExpired),
+                    _ => {
+                        return Err(InstanceServerError::ReceivedErrorCodeError {
                             error_code: response.status().as_str().to_string(),
                         })
+                    }
+                }
             } else {
                 Ok(response)
             }