Bug: HTTP basic auth causes user login failure, with the error message: login failed.

[0ct]

Steps to reproduce the behavior

1. Run a Docker container using the latest image. (docker run focalboard:latest)
2. Register a user. Since the page allows arbitrary registration, HTTP basic auth is implemented.
3. Add a user to OpenResty.
4. Open the address, verify the HTTP basic auth, and return to the login page.
5. Enter the username and password, click the login button, and the message "login failed" is displayed.

Edition and Platform

• Edition: mattermost/focalboard:7.11.4 (docker IMAGE NAME)
• Version: 7.11.4
• Browser and OS: Chrome on Mac

Additional context (optional)

1. Add the ability to turn off registration. I couldn't find it in the docs, so if it's already there, just ignore this.
2. Make sure HTTP basic auth doesn't mess with the login user.

Best regards.