The way I am trying to solve this issue is by creating a new View Controller and adding a Web View on to it with access to the website. There's a post here Get HTML from WKWebview in Swift that could help as you are using Swift, but without any detailing of your code this issue can't be solved completely. My solution is a bit unorthodox and frankly "bad coding", but it should in theory function well and I have seen other responses which do it similarly. Also, I would revise your question and try to make it more formal/informative so everyone could have a better chance at helping you out.
Good Luck!
Edit: Reviewing a different response
The easiest way to do this as mentioned by one of your comments would be to see if the Website you are using has an API. I used a course on Udemy which explained their functionalities if you need one. I would recommend looking at the Cocoa Pod Alamofire and seeing if it could help you (perhaps in conjunction with SwiftyJSON).
Side note:
The reason why I am not using Alamofire for my project (one similar to yours) is because I could not find an accessible API.