Auth ErrorTypeError: Failed to fetch

Hi Team,

I am trying to build API Documentation but I am"Auth ErrorTypeError: Failed to fetch".

Here i am trying enforce OAuth2.0 Security with client_credentials grant type.

I am looking for OAuth2.0 client_credential openAPI 3.0.0 or 2.0.0 document template where i can start editing please help.

Issue facing:

1.Client_credential not accepting by Spec/not getting token but I ran code with postman and curl then its working

2.Could you please share sample Spec format for OAuth2.0 -Client_credentials.

Thanks,

Mahesh