Submit Fax through API

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Kindly provide the sample code to submit the FAX request,

I have tried to connect the submit the fax request https://test2.myportal.opentext.com/mra/v1/outbound/faxes through PostMan

However I'm getting an error " The requested URL was not found on this server. "

Get New Tocken Acccess in Authorization shows "Authentication complete" however it doesnt return the Token where as i can see "Your web browser must have JavaScript enabled\r\n in order for this application to display correctly."

Appreciate your help to resolve the issue