OptionaldomainOptionalfirstUse first name in the local part (requires parent context with 'firstName').
OptionallastUse last name in the local part (requires parent context with 'lastName').
OptionalproviderPreferred email provider name (e.g., 'gmail.com') or array to choose from. Overrides locale defaults.
OptionalsafeGenerate a safe, non-existent domain (e.g., 'example.com'). Defaults to false.
Specific domain or array of domains to choose from. Overrides provider and locale defaults.