How to extract data from API that is in html format using Robot framework

I'm trying to extract data returned from API in html format from the following tag. I need the value.

     <input name="__RequestVerificationToken" type="hidden" 
    value="CfDJ8HAHZQfAcMxBmpaspuVDRFPEKRneMMKaS7FGTmqmlPl- 
   xzvjkuePYhTesJqt0FABIwdSzEok25kZRCLzWX_8tdmtmCRJnrdYrP2PR-HZXcFzcGaSuQXbtL4qS6xfjlW_1qVAdMilo8Js9XzdEqlKsB3EKLKNqqubcsT98AkfbJTisZO_Q9vXg8crfafEouhBFQ" />

*** Settings *** Library RequestsLibrary Library XML

*** Variables *** ${login_url} https://testworthy.us

*** Test Cases *** get api Create Session mysession ${login_url} ${response}= Get Request mysession /Login Log To Console ${response.content}

Solution

The error tells you exactly what the problem is: it doesn't know what user1 is. user1 comes from a variable, but you still need to use quotes when forming a valid reference to the data:

${username}=    Set Variable    ${user_data['users']['${user_key}']['username']}
${user_data['users']['user1']['username']}
#                                                    ^           ^