fix

package-lock.json

@@ -10554,9 +10554,9 @@
       }
     },
     "rxjs": {
-      "version": "6.5.3",
-      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.3.tgz",
-      "integrity": "sha512-wuYsAYYFdWTAnAaPoKGNhfpWwKZbJW+HgAJ+mImp+Epl7BG8oNWBCTyRM8gba9k4lk8BgWdoYm21Mo/RYhhbgA==",
+      "version": "6.5.4",
+      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.4.tgz",
+      "integrity": "sha512-naMQXcgEo3csAEGvw/NydRA0fuS2nDZJiw1YUWFKU7aPPAPGZEsD4Iimit96qwCieH6y614MCLYwdkrWx7z/7Q==",
       "requires": {
         "tslib": "^1.9.0"
       }

package.json

@@ -40,7 +40,7 @@
     "cordova-plugin-whitelist": "^1.3.4",
     "cordova-sqlite-storage": "^3.4.1",
     "core-js": "^3.3.2",
-    "rxjs": "~6.5.3",
+    "rxjs": "^6.5.4",
     "zone.js": "^0.10.2"
   },
   "devDependencies": {

src/app/services/api/user.service.ts

@@ -1,7 +1,7 @@
 import { Injectable } from '@angular/core';
 import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
 import 'rxjs/add/operator/map';
-import { Observable } from 'rxjs/Rx';
+import { Observable } from 'rxjs';
 
 @Injectable({
   providedIn: 'root'