| UnauthorizedClient | |
| 1 (Data Constructor) | Network.OAuth.OAuth2.TokenRequest, Network.OAuth.OAuth2 |
| 2 (Data Constructor) | Network.OAuth.OAuth2.AuthorizationRequest |
| unAuthorizeState | Network.OAuth2.Experiment.Types, Network.OAuth2.Experiment |
| unClientId | Network.OAuth2.Experiment.Types, Network.OAuth2.Experiment |
| unClientSecret | Network.OAuth2.Experiment.Types, Network.OAuth2.Experiment |
| unCodeChallenge | Network.OAuth2.Experiment.Pkce |
| unCodeVerifier | Network.OAuth2.Experiment.Pkce, Network.OAuth2.Experiment |
| UnknownErrorCode | |
| 1 (Data Constructor) | Network.OAuth.OAuth2.TokenRequest, Network.OAuth.OAuth2 |
| 2 (Data Constructor) | Network.OAuth.OAuth2.AuthorizationRequest |
| unPassword | Network.OAuth2.Experiment.Types, Network.OAuth2.Experiment |
| unRedirectUri | Network.OAuth2.Experiment.Types, Network.OAuth2.Experiment |
| unScope | Network.OAuth2.Experiment.Types, Network.OAuth2.Experiment |
| UnsupportedGrantType | Network.OAuth.OAuth2.TokenRequest, Network.OAuth.OAuth2 |
| UnsupportedResponseType | Network.OAuth.OAuth2.AuthorizationRequest |
| unUsername | Network.OAuth2.Experiment.Types, Network.OAuth2.Experiment |
| uriToRequest | Network.OAuth.OAuth2 |
| uriToText | Network.OAuth2.Experiment |
| userCode | Network.OAuth2.Experiment.Flows.DeviceAuthorizationRequest, Network.OAuth2.Experiment |
| Username | |
| 1 (Type/Class) | Network.OAuth2.Experiment.Types, Network.OAuth2.Experiment |
| 2 (Data Constructor) | Network.OAuth2.Experiment.Types, Network.OAuth2.Experiment |