Add docs for testing SSO

README.md

@@ -8,11 +8,11 @@
 1. add client from the admin panel
     - Client ID: mv
     - redirect uris: http://localhost:4000/auth/user/rauthy/callback
-    - Authorization Flows: authorization_code, password, client_credentials (maybe also just fewer needed)
+    - Authorization Flows: authorization_code
     - allowed origins: http://localhost:4000
     - access/id token algortihm: RS256 (EDDSA did not work for me, found just few infos in the ashauthentication docs)
 1. copy client secret to `.env` file
-1. abort and run mix phx.server again
+1. abort and run `just run` again