TEST
https://felgttestaws.digifact.com.gt/felapiv2/api/FelRequest

PROD
https://felgtaws.digifact.com.gt/gt.com.fel.api.v2/api/FelRequest

CERTIFICAR
?NIT=000044653948&TIPO=CERTIFICATE_DTE_XML_TOSIGN&FORMAT=XML

ANULAR
?NIT=000044653948&TIPO=ANULAR_FEL_TOSIGN&FORMAT=XML