diff --git a/projects/angular-auth-oidc-client/src/lib/login/par/par-login.service.ts b/projects/angular-auth-oidc-client/src/lib/login/par/par-login.service.ts
index 8d26c956..f5708133 100644
--- a/projects/angular-auth-oidc-client/src/lib/login/par/par-login.service.ts
+++ b/projects/angular-auth-oidc-client/src/lib/login/par/par-login.service.ts
@@ -48,13 +48,11 @@ export class ParLoginService {
       'BEGIN Authorize OIDC Flow, no auth data'
     );
 
-    const { urlHandler, customParams } = authOptions || {};
-
     this.authWellKnownService
       .queryAndStoreAuthWellKnownEndPoints(configuration)
       .pipe(
         switchMap(() =>
-          this.parService.postParRequest(configuration, authOptions, customParams)
+          this.parService.postParRequest(configuration, authOptions)
         )
       )
       .subscribe((response) => {
@@ -76,8 +74,8 @@ export class ParLoginService {
           return;
         }
 
-        if (urlHandler) {
-          urlHandler(url);
+        if (authOptions.urlHandler) {
+          authOptions.urlHandler(url);
         } else {
           this.redirectService.redirectTo(url);
         }
@@ -109,13 +107,11 @@ export class ParLoginService {
       'BEGIN Authorize OIDC Flow with popup, no auth data'
     );
 
-    const { customParams } = authOptions || {};
-
     return this.authWellKnownService
       .queryAndStoreAuthWellKnownEndPoints(configuration)
       .pipe(
         switchMap(() =>
-          this.parService.postParRequest(configuration, customParams)
+          this.parService.postParRequest(configuration, authOptions)
         ),
         switchMap((response: ParResponse) => {
           this.loggerService.logDebug(
diff --git a/projects/angular-auth-oidc-client/src/lib/login/par/par.service.ts b/projects/angular-auth-oidc-client/src/lib/login/par/par.service.ts
index c3ecac4b..cc7b71c3 100644
--- a/projects/angular-auth-oidc-client/src/lib/login/par/par.service.ts
+++ b/projects/angular-auth-oidc-client/src/lib/login/par/par.service.ts
@@ -3,6 +3,7 @@ import { Injectable } from '@angular/core';
 import { Observable, throwError } from 'rxjs';
 import { catchError, map, retry, switchMap } from 'rxjs/operators';
 import { DataService } from '../../api/data.service';
+import { AuthOptions } from '../../auth-options';
 import { OpenIdConfiguration } from '../../config/openid-configuration';
 import { LoggerService } from '../../logging/logger.service';
 import { StoragePersistenceService } from '../../storage/storage-persistence.service';
@@ -20,7 +21,7 @@ export class ParService {
 
   postParRequest(
     configuration: OpenIdConfiguration,
-    customParams?: { [key: string]: string | number | boolean }
+    authOptions: AuthOptions
   ): Observable<ParResponse> {
     let headers: HttpHeaders = new HttpHeaders();
 
@@ -50,7 +51,7 @@ export class ParService {
     }
 
     return this.urlService
-      .createBodyForParCodeFlowRequest(configuration, customParams)
+      .createBodyForParCodeFlowRequest(configuration, authOptions)
       .pipe(
         switchMap((data) => {
           return this.dataService