UserCredential
interface
A structure containing a User, an AuthCredential, the operationType, and any additional user information that was returned from the identity provider. operationType could be 'signIn' for a sign-in operation, 'link' for a linking operation and 'reauthenticate' for a re-authentication operation.
TODO @salakar; missing credential, operationType
Properties
additionalUserInfo
</>Any additional user information assigned to the user.
additionalUserInfo: AdditionalUserInfo;