WS 11.x REST API

I am having some trouble with the REST api on a new installation of 11.1. I am using postman to send a POST to
https://[serverURL]/ws-api/login with what i know are valid credentials for my admin account. The url i am using is the same one that is in the %WS_CONFIG%\ws-api\api.properties file (without the /login at the end) Does anyone have an idea as to whati might have configured incorrectly? I can get to the rest docs on the server by going to https://[serverURL]/ws-api/docs/ws-api-doc-v1.html

Any help is appreciated.