@Override
    @JsonProperty
    @JsonPropertyDescription("A set of issuers (in addition to the 'issuer' property that is provided by the IDP " +
                             "that are deemed valid when seen in a token. If no additional valid issuers are " +
                             "required then set this to an empty set. Also this is used to validate the 'issuer' " +
                             "returned by the IDP when it is not a sub path of 'openIdConfigurationEndpoint'. If " +
                             "this set is empty then Stroom will verify that the ")
    public Set<String> getValidIssuers() {
        return validIssuers;
    }
@return The type of Open ID Connnect identity provider in use.
stroom-security/stroom-security-openid-api/src/main/java/stroom/security/openid/api/AbstractOpenIdConfig.java