I want to change my username on my profile

Issue:
I want to change my username on my profile from ‘Jasper_Brix_Coloma’’ to ‘Jay_Brix’

System Information

  • Operating System: windows 10
  • CPU: Intel® Core™ I3-7020U CPU @ 2.30GHz 2.30 GHz
  • GPU: Intel® HD Graphics 620
  • Citra Version (found in title bar): Nightly 1584
  • Game: Pokemon Ultra Sun
  • Screenshot of Issue (include the full Citra window including titlebar):

Diagnostic Log
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Thank you CitraBot.
One more question. how can I turn on my notification on this site?
Thanks again in advanced.