Profile CRUD

### Version info

**Angular:**

**Firebase:**

**AngularFire:**

**Other (e.g. Ionic/Cordova, Node, browser, operating system):**

### How to reproduce these conditions

**Failing test unit, Stackblitz demonstrating the problem**

**Steps to set up and reproduce**

**Sample data and security rules**

### Debug output

** Errors in the JavaScript console **

** Output from `firebase.database().enableLogging(true);` **

** Screenshots **

### Expected behavior

### Actual behavior

The issue names no repository files, tests, reproduction, or acceptance criteria. Begin with the AngularFire Developer's Guide and the linked Firebase and Stack Overflow support resources; no concrete definition of done is supplied.

Written by the indexing model from the issue text.