question: get the username for authentication . concode_field_sep String plainTextUriStreaming concode_elem_sep boolean shouldLoadRemoteMetaData concode_elem_sep String secretKey concode_elem_sep String apiKey concode_elem_sep String sslUri concode_elem_sep String plainTextUri concode_elem_sep int port concode_elem_sep String exchangeClassName concode_elem_sep String userName concode_elem_sep String sslUriStreaming concode_elem_sep String password concode_elem_sep String exchangeDescription concode_elem_sep Map<String,Object> exchangeSpecificParameters concode_elem_sep String host concode_elem_sep String exchangeName concode_elem_sep String metaDataJsonFileOverride concode_field_sep String getSecretKey concode_elem_sep void setPassword concode_elem_sep void setMetaDataJsonFileOverride concode_elem_sep void setSslUriStreaming concode_elem_sep Map<String,Object> getExchangeSpecificParameters concode_elem_sep Object getExchangeSpecificParametersItem concode_elem_sep void setExchangeDescription concode_elem_sep String getPlainTextUri concode_elem_sep void setApiKey concode_elem_sep void setPort concode_elem_sep String getMetaDataJsonFileOverride concode_elem_sep String getPlainTextUriStreaming concode_elem_sep void setSslUri concode_elem_sep void setUserName concode_elem_sep void setPlainTextUri concode_elem_sep String getHost concode_elem_sep Object getParameter concode_elem_sep void setExchangeName concode_elem_sep void setHost concode_elem_sep void setSecretKey concode_elem_sep void setPlainTextUriStreaming concode_elem_sep String getApiKey concode_elem_sep String getSslUriStreaming concode_elem_sep String getExchangeName concode_elem_sep boolean isShouldLoadRemoteMetaData concode_elem_sep String getExchangeClassName concode_elem_sep String getSslUri concode_elem_sep String getPassword concode_elem_sep int getPort concode_elem_sep void setExchangeSpecificParameters concode_elem_sep void setShouldLoadRemoteMetaData concode_elem_sep void setExchangeSpecificParametersItem concode_elem_sep String getExchangeDescription
target: String function ( ) { return userName ; }