[Solved] Syntax Error in Ruby. unexpected keyword_end, expecting end-of-inputs [closed]

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You can’t define a module using module Auth():

irb(main):001:0> module Auth()
irb(main):002:1> end
SyntaxError: (irb):1: syntax error, unexpected '\n', expecting :: or '[' or '.'

and

irb(main):001:0> module Auth()
irb(main):002:1>   def login(id)
irb(main):003:2>   end
irb(main):004:1> end
SyntaxError: (irb):1: syntax error, unexpected '\n', expecting :: or '[' or '.'
(irb):4: syntax error, unexpected keyword_end, expecting end-of-input

Removing the trailing parenthesis fixes the error:

irb(main):001:0> module Auth
irb(main):002:1>   def login(id)
irb(main):003:2>   end
irb(main):004:1> end
=> :login

and

irb(main):001:0> module Auth
irb(main):002:1>   module_function()
irb(main):003:1>
irb(main):004:1*   def login(id)
irb(main):005:2>     members = ['abc', 'def', 'ghi']
irb(main):006:2>
irb(main):007:2*     for member in members do
irb(main):008:3*       if (id == member)
irb(main):009:4>         return true
irb(main):010:4>       end
irb(main):011:3>     end
irb(main):012:2>     return false
irb(main):013:2>   end
irb(main):014:1> end
=> :login

Your code could be more Ruby-like:

def login(id)
  ['abc', 'def', 'ghi'].each do |member|
    return true if (id == member)
  end
  return false
end
login('ghi') # => true
login('foo') # => false

which can be refactored to:

def login(id)
  ['abc', 'def', 'ghi'].any? { |member| (id == member) }
end
login('ghi') # => true
login('foo') # => false

then to:

def login(id)
  ['abc', 'def', 'ghi'].include?(id)
end
login('ghi') # => true
login('foo') # => false

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solved Syntax Error in Ruby. unexpected keyword_end, expecting end-of-inputs [closed]