nl_tokens: Sign the request
pl_tokens: function ( application_secret , token_secret , signature_base ) { var passphrase ; <mask> signature ; application_secret = encode ( application_secret ) ; token_secret = encode ( token_secret || '' ) ; passphrase = application_secret + '&' + token_secret ; signature = Cryptography . hmac ( Cryptography . SHA1 , passphrase , signature_base ) ; return btoa ( signature ) ; }