Merge branch '469-username-should-not-contain-special-and-space-character' into 'develop'

Resolve "Username should not contain special and space character"

Closes #469

See merge request !190
5 jobs for develop in 4 minutes and 34 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
passed test:php #16995

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passed test:typoscript #16994

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  Build
passed build #16996

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  Layout
passed layout #16997

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  Deploy
passed deploy-develop #16998

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