exclude encode for username and password

[peterhashair]

Description:

Fixes : https://github.com/matomo-org/matomo/issues/19899 Hard coded password and username skip encode.

Review

• [ ] Functional review done
• [ ] Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• [ ] Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• [ ] Security review done
• [ ] Wording review done
• [ ] Code review done
• [ ] Tests were added if useful/possible
• [ ] Reviewed for breaking changes
• [ ] Developer changelog updated if needed
• [ ] Documentation added if needed
• [ ] Existing documentation updated if needed

[sgiehl]

As discussed on slack, those changes won't be much useful. Will prepare another PR to fix that.