presto-verifier/src/main/java/io/prestosql/verifier/VerifierConfig.java/VerifierConfig/setControlUsernameOverride
class VerifierConfig:    @ConfigDescription("Username for control cluster")
    @Config("control.username-override")
    @LegacyConfig("control.username")
    public VerifierConfig setControlUsernameOverride(String controlUsernameOverride)
    {
        this.controlUsernameOverride = controlUsernameOverride;
        return this;
    }