feat(authService): optional logout request

src/authService.js

@@ -239,13 +239,16 @@ export class AuthService {
    * @return {Promise<>}
    */
   logout(redirectUri) {
-    return new Promise(resolve => {
+    let localLogout = () => new Promise(resolve => {
       this.authentication.responseObject = null;
-
       this.authentication.redirect(redirectUri, this.config.logoutRedirect);
 
       resolve();
     });
+
+    return (this.config.logoutUrl
+      ? this.client.request(this.config.logoutMethod, this.config.withBase(this.config.logoutUrl)).then(localLogout)
+      : localLogout());
   }
 
   /**

src/baseConfig.js

@@ -59,6 +59,10 @@ export class BaseConfig {
   baseUrl = '';
   // The API endpoint to which login requests are sent
   loginUrl = '/auth/login';
+  // The API endpoint to which logout requests are sent (not needed for jwt)
+  logoutUrl = null;
+  // The HTTP method used for 'unlink' requests (Options: 'get' or 'post')
+  logoutMethod = 'get';
   // The API endpoint to which signup requests are sent
   signupUrl = '/auth/signup';
   // The API endpoint used in profile requests (inc. `find/get` and `update`)