in FirebaseAuthUI/Sources/Public/FirebaseAuthUI/FUIAuthErrors.h [40:66]
typedef NS_ENUM(NSUInteger, FUIAuthErrorCode) {
/** @var FUIAuthErrorCodeUserCancelledSignIn
@brief Indicates the user cancelled a sign-in flow.
*/
FUIAuthErrorCodeUserCancelledSignIn = 1,
/** @var FUIAuthErrorCodeProviderError
@brief Indicates there's an error from the identity provider. The
@c FUIAuthErrorUserInfoProviderIDKey field in the @c NError.userInfo dictionary will
contain the ID of the identity provider.
*/
FUIAuthErrorCodeProviderError = 2,
/** @var FUIAuthErrorCodeCantFindProvider
@brief Indicates that @FUIAuth.providers doen't contain current provider (see NSError.userInfo
key @c FUIAuthErrorUserInfoProviderIDKey).
*/
FUIAuthErrorCodeCantFindProvider = 3,
/** @var FUIAuthErrorCodeMergeConflict
@brief Indicates that a merge conflict occurred while trying to automatically upgrade an
anonymous user. The non-anonymous credential can be obtained from the userInfo dictionary
of the corresponding NSError using the @c FUIAuthCredentialKey.
*/
FUIAuthErrorCodeMergeConflict = 4,
};