Error codes

Code	Description
`YXLErrorCodeNotActivated`	SDK Yandex ID wasn't activated.
`YXLErrorCodeCancelled`	Authorization controller was closed by the user.
`YXLErrorCodeDenied`	User denied authorization.
`YXLErrorCodeInvalidClient`	Invalid app ID was passed.
`YXLErrorCodeInvalidScope`	Wrong scopes were specified when registering the app.
`YXLErrorCodeOther`	Other errors.
`YXLErrorCodeRequestError`	Internal HTTP request error.
`YXLErrorCodeRequestConnectionError`	Connection error.
`YXLErrorCodeRequestSSLError`	SSL error.
`YXLErrorCodeRequestNetworkError`	Other HTTP errors.
`YXLErrorCodeRequestResponseError`	Response indicating an error occurred when processing the HTTP request (a response status code outside the 200–299 range).
`YXLErrorCodeRequestEmptyDataError`	Empty HTTP response received.
`YXLErrorCodeRequestJwtError`	Invalid response to a JWT request was returned.
`YXLErrorCodeRequestJwtInternalError`	Internal JWT error.
`YXLErrorCodeInvalidState`	Invalid state parameter.
`YXLErrorCodeInvalidCode`	Error occurred when obtaining a token in exchange for an authorization code.
`YXLActivationErrorCodeNoAppId`	App ID is `nil`.
`YXLActivationErrorCodeNoQuerySchemeInInfoPList`	No `yandexauth` scheme in `Info.plist`.
`YXLActivationErrorCodeNoSchemeInInfoPList`	No `yx<client app ID>` scheme in `Info.plist`.