mapError
  :: XINGError
  -> APIError
mapError (XINGError "INVALID_OAUTH_SIGNATURE" _)        = OAuthError "Invalid oauth signature. Check your consumer and access token secret."
mapError
  :: XINGError
  -> APIError
mapError (XINGError "INVALID_OAUTH_SIGNATURE" _)        = OAuthError "Invalid oauth signature. Check your consumer and access token secret."
mapError (XINGError "INVALID_OAUTH_SIGNATURE" _)        = OAuthError "Invalid oauth signature. Check your consumer and access token secret."