Add guards (#486)

apps/client/src/app/pages/portfolio/transactions/transactions-page.component.ts

@@ -261,7 +261,7 @@ export class TransactionsPageComponent implements OnDestroy, OnInit {
   }: OrderModel): void {
     const dialogRef = this.dialog.open(CreateOrUpdateTransactionDialog, {
       data: {
-        accounts: this.user.accounts.filter((account) => {
+        accounts: this.user?.accounts?.filter((account) => {
           return account.accountType === 'SECURITIES';
         }),
         transaction: {
@@ -346,7 +346,7 @@ export class TransactionsPageComponent implements OnDestroy, OnInit {
   private openCreateTransactionDialog(aTransaction?: OrderModel): void {
     const dialogRef = this.dialog.open(CreateOrUpdateTransactionDialog, {
       data: {
-        accounts: this.user.accounts.filter((account) => {
+        accounts: this.user?.accounts?.filter((account) => {
           return account.accountType === 'SECURITIES';
         }),
         transaction: {