[ACS-3551] feat: add context to outgoing requests for auth intgerceptors (#7913)

lib/core/auth/src/authentication.ts

@@ -0,0 +1,23 @@
+/*!
+ * @license
+ * Copyright 2019 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { HttpHeaders } from '@angular/common/http';
+import { Observable } from 'rxjs';
+
+export abstract class Authentication {
+    public abstract addTokenToHeader(headers: HttpHeaders): Observable<HttpHeaders>;
+}