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    David Ng said about 4 years ago on Two Factor Authentication :
    I got this error, how does opt_code work?  


    Showing /home/davidnghk/App6/fc4s/code/app/views/devise/sessions/new.html.erb where line #15 raised:

    undefined method `otp_code_token' for #<User:0x00005611ff730138>
Did you mean?  otp_code
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