Invalid Username or Password
<!--When trying to link my account, I get an error "invalid username or password."  Sometimes the API will allow me to enter my username and password, and then when it asks me for the 2-factor identification code, it will give me the error after I enter the code.  Sometimes I get the error as soon as I submit my username and password before it even askes me for the 2-factor identification code.  Any suggestions?

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# Bug Report

### Describe the Bug
<!-- ✍️edit: --> A clear and concise description of the problem...

### To Reproduce
Steps to reproduce the behavior:
 - Create an `ApiClient`
 - Attempt to ...
 - See error

### Expected behavior
<!-- ✍️edit: --> A clear and concise description of what you expected to happen.


### Screenshots/Logs
<!-- ✍️edit: --> If applicable, add screenshots and log output to help explain your problem.

### Additional context
<!-- ✍️edit: --> Add any other context about the problem here.

### Environment
<!-- ✍️edit: -->
 - OS: [e.g. Raspbian]
 - Node.js: [e.g. 12.14.1] <!-- run `node -v` to get current version -->
 - NPM: [e.g 6.13.4] <!-- run `npm -v` to get current version -->
 - ring-client-api: [e.g 6.0.3]
