class method

SecureRandom.alphanumeric

alphanumeric(n = nil, chars: ALPHANUMERIC)

# File tmp/rubies/ruby-4.0.0/lib/securerandom.rb, line 54
def alphanumeric(n = nil, chars: ALPHANUMERIC)
  n = 16 if n.nil?
  choose(chars, n)
end

Compatibility methods for Ruby 3.2, we can remove this after dropping to support Ruby 3.2