Add a WIP info to the README.

README.md

@@ -6,6 +6,10 @@ An auth provider for go-micro, it get's users from a postgres database, in the f
 
 It registers itself with [router](https://jochum.dev/jo-micro/router), if you use it in your stack.
 
+## THIS IS WORK IN PROGRESS
+
+Everything in here may change without backward compatiblity until we reach v1.0.0. You also might except bugs or half-implemented stuff.
+
 ## JWT Token Auth
 
 ### Generate keys