Microsoft Auth Errors on Account Creation

### [REQUIRED] Describe your environment

* Operating System version: OSX
* Browser version: Chrome 73
* Firebase SDK version: Web 5.8.4
* Firebase Product: auth

### [REQUIRED] Describe the problem

When I attempt to create an account using the new Microsoft auth I receive this error:

```
Failed to fetch resource from https://graph.microsoft.com/v1.0/me, http status: 202, http response: {"@odata.context":"https://graph.microsoft.com/v1.0/$metadata#users/$entity","id":"XYZ","userPrincipalName":"XYZ@XYZ.com","businessPhones":[],"displayName":null,"jobTitle":null,"mail":null,"mobilePhone":null,"officeLocation":null,"preferredLanguage":null}
```

Note: I've redacted the `id` and `userPrincipalName` name here.

The Firebase account is actually created successfully (even though it doesn't log me in after the creation process) but properties like emailVerified are not set on the account. After the initial error, I am able to log into the newly created account via Microsoft login.