Add list of users from public keys.

src/app/_services/auth.service.ts

@@ -138,6 +138,12 @@ export class AuthService {
     window.location.reload(true);
   }
 
+  getTrustedUsers(): any {
+    let trustedUsers = [];
+    this.mutableKeyStore.getPublicKeys().forEach(key => trustedUsers.push(key.users[0].userId));
+    return trustedUsers;
+  }
+
   async getPublicKeys(): Promise<void> {
     this.httpWrapperService.get(`${environment.publicKeysUrl}`).pipe(first()).subscribe(async res => {
       await this.mutableKeyStore.importPublicKey(res.body);