SignupAttribute
- dataType: "text" or "number"enum
_type required - keyType: stringrequired
Llave física de la columna (custom_field1 a custom_field4)
- labelType: stringrequired
- requiredType: booleanrequired
- uiType: "text" or "radio" or "select"enum
_type required - optionsType: array of string
Solo requerido para radio o select