Update authentication-custom.md

Author: shibayan

articles/static-web-apps/authentication-custom.md

@@ -219,15 +219,15 @@ Once you have the registration credentials, use the following steps to create a
              "registration": {
                "clientIdSettingName": "<MY_PROVIDER_CLIENT_ID>",
                "clientCredential": {
-                 "secretSettingName": "<MY_PROVIDER_CLIENT_SECRET>"
+                 "clientSecretSettingName": "<MY_PROVIDER_CLIENT_SECRET>"
                },
                "openIdConnectConfiguration": {
                  "wellKnownOpenIdConfiguration": "https://<MY_ID_SERVER>/.well-known/openid-configuration"
                }
              },
              "login": {
                "nameClaimType": "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name",
-               "scope": [],
+               "scopes": [],
                "loginParameterNames": []
              }
            }