Once the customer is linked, the customer's id can be requested as follows:
Indigitall.getCustomerWithSuccess { INCustomer in
//do something
} onError: { INError in
//do something
}
And the customer's information about its fields as follows:
Indigitall.getCustomerInformation(withFieldNames: [String]?) { [INCustomerField] in
} onError: { INError in
}