I am developing a project with swift.
How can I have chatGPT solve a “string” type math problem using the API?

**let apiKey = “API_KEY”
let endpoint = “https://api.openai.com/v1/engines/davinci-codex/completions”

 func solveEquation(equation: String, completion: @escaping (String?) -> Void) {
     guard let url = URL(string: endpoint) else {
         completion(nil)
         return
     }

     var request = URLRequest(url: url)
     request.httpMethod = "POST"
     request.setValue("Bearer (apiKey)", forHTTPHeaderField: "Authorization")
     request.setValue("application/json", forHTTPHeaderField: "Content-Type")

     let parameters: [String: Any] = [
         "prompt": "Solve the following equation: (equation)",
         "max_tokens": 100
     ]

     do {
         request.httpBody = try JSONSerialization.data(withJSONObject: parameters, options: [])
     } catch {
         completion(nil)
         return
     }

     let task = URLSession.shared.dataTask(with: request) { data, response, error in
         guard error == nil, let data = data else {
             completion(nil)
             return
         }

         do {
             if let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any],
                let choices = json["choices"] as? [[String: Any]],
                let text = choices.first?["text"] as? String {
                 completion(text.trimmingCharacters(in: .whitespacesAndNewlines))
             } else {
                 completion(nil)
             }
         } catch {
             completion(nil)
         }
     }

     task.resume()
 }**

CONSOLE LOG :

Failed to get the home directory when checking model path.

nw_connection_copy_connected_local_endpoint_block_invoke [C1] Connection has no local endpoint