question: for status codes of 0 , `` success '' is returned ; otherwise and error message is present describing the issue with validation for example , `` incorrect password '' , or `` user not found '' concode_field_sep int SUCCESS_CODE concode_elem_sep int DUPLICATE_TXN_ERROR_CODE concode_elem_sep int OTHER_ERROR_CODE concode_elem_sep Integer code concode_elem_sep String SUCCESS_MESSAGE concode_elem_sep int AUTH_ERROR_CODE concode_elem_sep String message concode_field_sep void setResponseCode concode_elem_sep Integer getCode
target: String function ( ) { return message ; }