{
   // Client Id
   "username":"username",
   // Client Secret
   "password":"password",
   
   // Optionally override secrets:
   // Relative or absolute path to a PEM or DER file, or its content inline
   "certificate":"./my_cert.der",
   // Subject Alternative Name, URI=
   "application_uri":"urn:example.com",
   // Relative or absolute path to a PEM or  "username":"username",DER file, or its content inline
   "passwordprivate_key":"password"./my_priv.der",
}