Vapi vonage credentials are not being saved and unable to get credentialId

Hi I am creating number on vapi through imported from vounage through create number api. But I am stucked on geting credentialsId.


I guess I will get it from External provider keys section where we have to add api key and secret for vonage. But when I enter key and secret, I got the error mentioned in pic
Screenshot_2025-05-16_161129.png
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