Use new user instance

[SharkyKZ]

Pull Request for Issue # .

Summary of Changes

Create new user instance before clearing access rights cache so as not to clear it globally.

Testing Instructions

Code review.

[viocassel]

I have tested this item ✅ successfully on 56f7bc0

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/22697.}

[alikon]

I have tested this item ✅ successfully on 56f7bc0

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/22697.}

[alikon]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/22697.}

[HLeithner]

@SharkyKZ whats the reason for this change?

[SharkyKZ]

It was a mistake on my part. We need to check new user access rights in this plugin but we shouldn't clear them on the global user instance as this could lead to undesirable behavior in code and other plugins that run after this one.

[HLeithner]

ok thx

[HLeithner]

thx