Fluxctl exposes GIT_AUTHKEY in console output

[janw]

Describe the bug

When using fluxctl sync the used authentication key / token is prominently displayed as part of the console output.

To Reproduce
Steps to reproduce the behaviour:

1. Upgrade fluxd and fluxctl to 1.15.0, and set the deployment up to use Git over HTTPS
2. Run fluxctl sync
3. See "Synchronizing with https://…:MYTOKEN@…" as the very first line of output

Expected behavior

The authentication token should be hidden like it's done in fluxd's log output.

Logs
N/A

Additional context
Add any other context about the problem here, e.g

• Flux version: 0.15.0
• Helm Operator version: N/A
• Kubernetes version: 1.15.3
• Git provider: GitLab on premise
• Container registry provider: GitLab on premise