Python

Hi

I am new to OneSpan and trying to going through following blog  

https://www.onespan.com/blog/onespan-sign-how-making-rest-calls-onespan-signs-api-python

But i am getting following response 

{"code":404,"messageKey":"error.notFound.userNotFound","technical":"Could not find user with uid 'Mrx4UBnpkHc4'","message":"The specified user cannot be found.","name":"Resource Not Found"}