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Rule "missing hyphen in 'two factor auth'"

This is one of many errors that LanguageTool can detect.

Description: missing hyphen in 'two factor auth'
Message: When '\1-\2' is used as a modifier, it is usually spelled with a hyphen.
Category: Grammar (ID: GRAMMAR)
Link: https://languagetool.org/insights/post/hyphen/#compound-nouns-with-and-without-hyphens
Incorrect sentences
that this rule can detect:
  • He enabled 2 factor auth to protect his Facebook account.
    Correction suggestion: 2-factor
ID: FACTOR_HYPHEN [1]
Version: 6.6-SNAPSHOT (2024-11-25 22:33:08 +0100)