A scope is not always used for controlling access to a resource. You can also use it to simply mark an access token. There are scopes that cannot be associated to roles (e.g., openid, device_). Such scopes do not have to have roles associated with them. Skipping role validation for scopes is called scope whitelisting.
If you do not want a role validation for a scope in an API's request, add the scope as
white_listed_scopes in the
<APIM_HOME>/repository/conf/deployment.toml file and restart the server. It will be whitelisted. For example,
[apim.oauth_config] white_listed_scopes = ["^device_.*", "openid", "some_random_scope"]
Next, invoke the Token API to get a token for the scope that you just whitelisted. For example,
curl -k -d "grant_type=password&username=admin&password=admin&scope=some_random_scope" -H "Authorization: Basic WmRFUFBvZmZwYVFnR25ScG5iZldtcUtSS3IwYTpSaG5ocEVJYUVCMEN3T1FReWpiZTJwaDBzc1Vh" -H "Content-Type: application/x-www-form-urlencoded" https://localhost:8243/token
Note that the issued token has the scope you requested. You get the token without any role validation as the scope is whitelisted.