[ADF-4731] [Process - Cloud] - Improve IdentityUserService (#4924)

* [ADF-4731][Process - Cloud] - Improve IdentityUserService.

* * Updated unit tests.

* * Updated IdentityUserService document
* Fixed comments on the pr.

* * Added missing 'createdTimestamp' property to the IdentityUserModel.

* * Created IdentityJoinGroupRequestModel. * Updated doc. * Updated unit tests.

lib/process-services-cloud/src/lib/services/identity-user.service.ts

@@ -1,60 +0,0 @@
-/*!
- * @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 { Injectable } from '@angular/core';
-import { throwError as observableThrowError, Observable, from } from 'rxjs';
-import { catchError } from 'rxjs/operators';
-
-import { AppConfigService, LogService, AlfrescoApiService } from '@alfresco/adf-core';
-
-@Injectable()
-export class IdentityUserService {
-
-  constructor(
-    private apiService: AlfrescoApiService,
-    private appConfigService: AppConfigService,
-    private logService: LogService
-  ) { }
-
-  /**
-   * Finds groups filtered by username.
-   * @param username Object containing the name filter string
-   * @returns List of users information
-   */
-  findUsersByUsername(username: string): Observable<any> {
-    const url = this.getUserApi();
-    const httpMethod = 'GET', pathParams = {}, queryParams = { search: username }, bodyParam = {}, headerParams = {},
-      formParams = {}, contentTypes = ['application/json'], accepts = ['application/json'];
-
-    return (from(this.apiService.getInstance().oauth2Auth.callCustomApi(
-      url, httpMethod, pathParams, queryParams,
-      headerParams, formParams, bodyParam,
-      contentTypes, accepts, Object, null, null)
-    )).pipe(
-      catchError((err) => this.handleError(err))
-    );
-  }
-
-  private getUserApi() {
-    return `${this.appConfigService.get('identityHost')}/users`;
- }
-
-  private handleError(error: any) {
-    this.logService.error(error);
-    return observableThrowError(error || 'Server error');
-  }
-}

lib/process-services-cloud/src/lib/services/public-api.ts

@@ -15,5 +15,4 @@
  * limitations under the License.
  */
 
-export * from './identity-user.service';
 export * from './user-preference.cloud.service';