I wanted to play with the text to speech service and forked the Official Sample available at - Text to Speech Demo.
The sample uses Username and password while the credentials provide only an API Key.
The service(s) appear to be moving over to using API keys (in favour of username and password which is reasonable).
There must be a way to provide configuration(in the create new credentials page) which would provide the username and password. I can't locate those magic parameters to pass.
Any pointers would be appreciated.