protected OAuth20GrantTypes getWrongGrantType() {
        return OAuth20GrantTypes.AUTHORIZATION_CODE;
    }
This is {@link OAuth20PasswordGrantTypeTokenRequestValidatorTests}.

@author Misagh Moayyed
@since 6.0.0
support/cas-server-support-oauth/src/test/java/org/apereo/cas/support/oauth/validator/token/OAuth20PasswordGrantTypeTokenRequestValidatorTests.java