Updated to angular 11

Now compiling with strict mode in typescript
Need to error checking now

bookie/src/app/users/user.service.ts

@@ -18,7 +18,7 @@ const serviceName = 'UserService';
 export class UserService {
   constructor(private http: HttpClient, private log: ErrorLoggerService) {}
 
-  get(id: string): Observable<User> {
+  get(id: string | null): Observable<User> {
     const getUrl: string = id === null ? `${url}` : `${url}/${id}`;
     return <Observable<User>>(
       this.http
@@ -35,14 +35,6 @@ export class UserService {
     );
   }
 
-  listOfNames(): Observable<string[]> {
-    return <Observable<string[]>>(
-      this.http
-        .get<string[]>(`${url}/active`)
-        .pipe(catchError(this.log.handleError(serviceName, 'list')))
-    );
-  }
-
   save(user: User): Observable<User> {
     return <Observable<User>>(
       this.http