Fix events documentation code sample to use event.user

[mwbrooks]

Summary

The event documentation's code sample references event.user.id which is undefined. The user ID is available with event.user.

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

Merging #790 (0841938) into main (64eb7ed) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #790   +/-   ##
=======================================
  Coverage   65.24%   65.24%           
=======================================
  Files          11       11           
  Lines        1082     1082           
  Branches      320      320           
=======================================
  Hits          706      706           
  Misses        317      317           
  Partials       59       59           

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[seratch]

@mwbrooks Good catch - thanks 👍