presto-accumulo/src/main/java/io/prestosql/plugin/accumulo/conf/AccumuloConfig.java/AccumuloConfig/setUsername
class AccumuloConfig:    @Config(USERNAME)
    @ConfigDescription("Sets the user to use when interacting with Accumulo. This user will require administrative permissions")
    public AccumuloConfig setUsername(String username)
    {
        this.username = username;
        return this;
    }