diff --git a/npm/ng-packs/packages/core/src/lib/abstracts/auth-response.model.ts b/npm/ng-packs/packages/core/src/lib/abstracts/auth-response.model.ts
new file mode 100644
index 0000000000..7c8afaa3ec
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/abstracts/auth-response.model.ts
@@ -0,0 +1,10 @@
+export interface AbpAuthResponse {
+  access_token: string;
+  id_token: string;
+  token_type: string;
+  expires_in: number;
+  refresh_token: string;
+  scope: string;
+  state?: string;
+  tenant_domain?: string;
+}
diff --git a/npm/ng-packs/packages/core/src/lib/abstracts/auth.service.ts b/npm/ng-packs/packages/core/src/lib/abstracts/auth.service.ts
index 97bf0b7b24..3c6d62fae6 100644
--- a/npm/ng-packs/packages/core/src/lib/abstracts/auth.service.ts
+++ b/npm/ng-packs/packages/core/src/lib/abstracts/auth.service.ts
@@ -1,7 +1,9 @@
+import { HttpHeaders } from '@angular/common/http';
 import { Injectable } from '@angular/core';
 import { Params } from '@angular/router';
 import { Observable, of } from 'rxjs';
 import { LoginParams } from '../models/auth';
+import { AbpAuthResponse } from './auth-response.model';
 
 /**
  * Abstract service for Authentication.
@@ -10,8 +12,6 @@ import { LoginParams } from '../models/auth';
   providedIn: 'root',
 })
 export class AuthService implements IAuthService {
-  constructor() {}
-
   private warningMessage() {
     console.error('You should add @abp/ng-oauth packages or create your own auth packages.');
   }
@@ -42,6 +42,15 @@ export class AuthService implements IAuthService {
     this.warningMessage();
     return false;
   }
+
+  loginUsingGrant(
+    grantType: string,
+    parameters: object,
+    headers?: HttpHeaders,
+  ): Promise<AbpAuthResponse> {
+    console.log({ grantType, parameters, headers });
+    return Promise.reject(new Error('not implemented'));
+  }
 }
 
 export interface IAuthService {
@@ -56,4 +65,10 @@ export interface IAuthService {
   navigateToLogin(queryParams?: Params): void;
 
   login(params: LoginParams): Observable<any>;
+
+  loginUsingGrant(
+    grantType: string,
+    parameters: object,
+    headers?: HttpHeaders,
+  ): Promise<AbpAuthResponse>;
 }
diff --git a/npm/ng-packs/packages/core/src/lib/abstracts/index.ts b/npm/ng-packs/packages/core/src/lib/abstracts/index.ts
index 6a32fcf8eb..e1ff2f106b 100644
--- a/npm/ng-packs/packages/core/src/lib/abstracts/index.ts
+++ b/npm/ng-packs/packages/core/src/lib/abstracts/index.ts
@@ -1,3 +1,4 @@
 export * from './ng-model.component';
 export * from './auth.guard';
 export * from './auth.service';
+export * from './auth-response.model';
diff --git a/npm/ng-packs/packages/oauth/src/lib/services/oauth.service.ts b/npm/ng-packs/packages/oauth/src/lib/services/oauth.service.ts
index a8f937e8ca..e929ab7c79 100644
--- a/npm/ng-packs/packages/oauth/src/lib/services/oauth.service.ts
+++ b/npm/ng-packs/packages/oauth/src/lib/services/oauth.service.ts
@@ -2,23 +2,27 @@ import { Injectable, Injector } from '@angular/core';
 import { Params } from '@angular/router';
 import { from, Observable, lastValueFrom } from 'rxjs';
 import { filter, map, switchMap, take, tap } from 'rxjs/operators';
-import { IAuthService, LoginParams } from '@abp/ng.core';
+import { AbpAuthResponse, IAuthService, LoginParams } from '@abp/ng.core';
 import { AuthFlowStrategy } from '../strategies';
 import { EnvironmentService } from '@abp/ng.core';
 import { AUTH_FLOW_STRATEGY } from '../tokens/auth-flow-strategy';
-import { AuthConfig, OAuthService } from "angular-oauth2-oidc";
+import { OAuthService } from 'angular-oauth2-oidc';
+import { HttpHeaders } from '@angular/common/http';
 
 @Injectable({
   providedIn: 'root',
 })
 export class AbpOAuthService implements IAuthService {
   private strategy!: AuthFlowStrategy;
+  private readonly oAuthService: OAuthService;
 
   get isInternalAuth() {
     return this.strategy.isInternalAuth;
   }
 
-  constructor(protected injector: Injector, private oAuthService: OAuthService) {}
+  constructor(protected injector: Injector) {
+    this.oAuthService = this.injector.get(OAuthService);
+  }
 
   async init() {
     const environmentService = this.injector.get(EnvironmentService);
@@ -54,4 +58,25 @@ export class AbpOAuthService implements IAuthService {
   get isAuthenticated(): boolean {
     return this.oAuthService.hasValidAccessToken();
   }
+
+  loginUsingGrant(
+    grantType: string,
+    parameters: object,
+    headers?: HttpHeaders,
+  ): Promise<AbpAuthResponse> {
+    const { clientId: client_id, dummyClientSecret: client_secret } = this.oAuthService;
+    const access_token = this.oAuthService.getAccessToken();
+    const p = {
+      access_token,
+      grant_type: grantType,
+      client_id,
+      ...parameters,
+    };
+
+    if (client_secret) {
+      p['client_secret'] = client_secret;
+    }
+
+    return this.oAuthService.fetchTokenUsingGrant(grantType, p, headers);
+  }
 }