Question: So simply put I'm trying to make a simple search engine where I've got a MySQL database and its contents being displayed on a HTML table (using PHP to get the information) and I want to make a search bar that as you type, filters the list automatically.
I've found tutorials on how to make that with plain text where it displays in just a list, but nothing on how to filter an already displayed table.

If someone could point in me in the direction of some helpful links or maybe some code I could use to start me off that would be great, sorry if this has been answered before, I've been looking for 20 odd minutes and just can't find anything that works.

**TLDR**: Making a search bar that as you type, filters an HTML table filled a with MySQL database table's information brought onto the page via PHP code, cant find any tutorials or helpful links/code after 20-ish min of searching and came here.

Answer: 
I have doubt in the way you are passing the data.

Try to pass the data without doing **stringify** and see if it works.
1. check if signin method is in document.ready function
2. if synchronous call is needed then you can use 'async': false
3. controller signin method expects AuthenticationModel as input parameter hence check ajax method returns the expected object, else try as string parameters in controller
4. as per the above controller code it always return jsondata which always returns error object in it.