Added impersonation. More data available via auth service about the user. Added admin auth guard.

src/app/impersonation/impersonation.component.html

@@ -0,0 +1,19 @@
+@if (isAdmin()) {
+<mat-card appearance="outlined">
+	<mat-card-header>
+		<mat-card-title> Impersonation</mat-card-title>
+		<mat-card-subtitle>Impersonate as another user</mat-card-subtitle>
+	</mat-card-header>
+	<mat-card-actions>
+		<mat-form-field>
+			<mat-label>User to impersonate</mat-label>
+			<mat-select (selectionChange)="onChange($event)" [(value)]="impersonated">
+				<mat-option>{{getUsername()}}</mat-option>
+				@for (user of users; track user) {
+					<mat-option [value]="user.id">{{ user.name }}</mat-option>
+				}
+			</mat-select>
+		</mat-form-field>
+	</mat-card-actions>
+</mat-card>
+}