Codecov fails on CI because "No token specified or token is empty"

### Describe the bug

**context**
When I do submit a pull request.

**expectation**
I expected tests to pass.

**bug**
But instead Codecov fail on Ubuntu because "No token specified or token is empty".

**problem**
This is a problem for people creating pull requests.


### Reproduce the bug

Submit a pull request.

### List your environment

All operating systems.