Posting To Web API


Hello there…
So, I’m super new to Ionic, but so far, I really love it. I’m having a hard time posting to my mvc core web api.

I have a web api method that accepts a username (string) and password (string) and if the user is found, returns the user as a json object. I cannot seem to get this to work at all. Can someone help point me in the right direction to get this rolling?