[Home](./index.md) > [@firebase/auth-types](./auth-types.md) > [ActionCodeInfo](./auth-types.actioncodeinfo.md) > [data](./auth-types.actioncodeinfo.data.md) ## ActionCodeInfo.data property The data associated with the action code. Signature: ```typescript data: { email?: string | null; multiFactorInfo?: MultiFactorInfo | null; previousEmail?: string | null; }; ``` ## Remarks For the , , and actions, this object contains an email field with the address the email was sent to. For the action, which allows a user to undo an email address change, this object also contains a `previousEmail` field with the user account's current email address. After the action completes, the user's email address will revert to the value in the `email` field from the value in `previousEmail` field. For the action, which allows a user to verify the email before updating it, this object contains a `previousEmail` field with the user account's email address before updating. After the action completes, the user's email address will be updated to the value in the `email` field from the value in `previousEmail` field. For the action, which allows a user to unenroll a newly added second factor, this object contains a `multiFactorInfo` field with the information about the second factor. For phone second factor, the `multiFactorInfo` is a [MultiFactorInfo](./auth-types.multifactorinfo.md) object, which contains the phone number.