Errors

The onError callback includes an errorCode and errorMessage. The various error scenarios are described below.

`errorCode`	`errorMessage`	Description
`WRONG_CREDENTIALS`	Wrong credentials	The user provided incorrect login credentials to the merchant.
`OTP_FAILED`	Verification required	The user provided an incorrect OTP when logging into the merchant.
`CARD_FAILED`	Card not added	An error related to the card info occurred when attempting to update the card in the merchant.
`NO_SUBSCRIPTION`	Card not added	The user does not have a subscription with the merchant.
`ACCOUNT_ISSUE`	Card not added	There is an issue with the user's merchant account.
`MERCHANT_DOWN`	Card not added	The merchant's service is currently unavailable.
`COF_IS_NOT_SUPPORTED`	Card not added	The merchant does not support setting a card-on-file.
`NO_SESSION`	Session not found	A session was not found when initializing the SDK.
`SESSION_EXPIRED`	The session is expired	The session being used in the SDK expired.
`CLIENT_ID_NOT_FOUND`	Client ID not found	The SDK could not determine the `client_id`.
`OTHER`	Card not added	An unknown error occurred.