Deprecate logout() in Angular (#7668)

Deprecate `logout()` in Angular in favor of `logoutPopup()` and
`logoutRedirect()` since it is deprecated in msal-browser and will be
removed in v5.

Author: shylasummers

change/@azure-msal-angular-4fa3b34e-2f11-4135-9ee1-cf4b7c6cfb63.json

@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "Deprecate logout() in Angular",
+  "packageName": "@azure/msal-angular",
+  "email": "[email protected]",
+  "dependentChangeType": "patch"
+}

lib/msal-angular/src/IMsalService.ts

@@ -24,7 +24,10 @@ export interface IMsalService {
   handleRedirectObservable(): Observable<AuthenticationResult | null>;
   loginPopup(request?: PopupRequest): Observable<AuthenticationResult>;
   loginRedirect(request?: RedirectRequest): Observable<void>;
+  // @deprecated: Use logoutRedirect or logoutPopup
   logout(logoutRequest?: EndSessionRequest): Observable<void>;
+  logoutRedirect(logoutRequest?: EndSessionRequest): Observable<void>;
+  logoutPopup(logoutRequest?: EndSessionRequest): Observable<void>;
   ssoSilent(request: SsoSilentRequest): Observable<AuthenticationResult>;
   getLogger(): Logger;
   setLogger(logger: Logger): void;

lib/msal-angular/src/msal.service.ts

@@ -67,6 +67,7 @@ export class MsalService implements IMsalService {
   loginRedirect(request?: RedirectRequest): Observable<void> {
     return from(this.instance.loginRedirect(request));
   }
+  // @deprecated: Use logoutRedirect or logoutPopup
   logout(logoutRequest?: EndSessionRequest): Observable<void> {
     return from(this.instance.logout(logoutRequest));
   }