Feature/add impersonation mode in get account balances endpoint (#6272)

* Add impersonation mode

* Update changelog

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Added the ability to fetch top holdings for ETF and mutual fund assets from _Yahoo Finance_
+- Added support for the impersonation mode in the endpoint `GET api/v1/account/:id/balances`
 
 ### Changed
 

apps/api/src/app/account/account.controller.ts

@@ -132,12 +132,16 @@ export class AccountController {
   @UseGuards(AuthGuard('jwt'), HasPermissionGuard)
   @UseInterceptors(RedactValuesInResponseInterceptor)
   public async getAccountBalancesById(
+    @Headers(HEADER_KEY_IMPERSONATION.toLowerCase()) impersonationId: string,
     @Param('id') id: string
   ): Promise<AccountBalancesResponse> {
+    const impersonationUserId =
+      await this.impersonationService.validateImpersonationId(impersonationId);
+
     return this.accountBalanceService.getAccountBalances({
       filters: [{ id, type: 'ACCOUNT' }],
       userCurrency: this.request.user.settings.settings.baseCurrency,
-      userId: this.request.user.id
+      userId: impersonationUserId || this.request.user.id
     });
   }