pulp-login: change roles/ to groups/

we still need an api endpoint to check whether we're logged in or not,
but `/pulp/api/v3/roles/` requires the user to be admin.
Changing to `/pulp/api/v3/groups/`, as per #198.

Closes #198

Author: himdel

src/api/pulp-login.ts

@@ -4,6 +4,6 @@ const base = new PulpAPI();
 
 export const PulpLoginAPI = {
   try: (username, password) =>
-    // roles = any api that will always be there and requires auth
-    base.http.get(`roles/`, { auth: { username, password } }),
+    // groups = any api that will always be there and requires auth
+    base.http.get(`groups/`, { auth: { username, password } }),
 };