Enhance authentication UX (#3807)

server/forge/forgejo/forgejo.go

@@ -111,16 +111,7 @@ func (c *Forgejo) oauth2Config(ctx context.Context) (*oauth2.Config, context.Con
 // Forgejo account details are returned when the user is successfully authenticated.
 func (c *Forgejo) Login(ctx context.Context, req *forge_types.OAuthRequest) (*model.User, string, error) {
 	config, oauth2Ctx := c.oauth2Config(ctx)
-	redirectURL := config.AuthCodeURL("woodpecker")
-
-	// check the OAuth errors
-	if req.Error != "" {
-		return nil, redirectURL, &forge_types.AuthError{
-			Err:         req.Error,
-			Description: req.ErrorDescription,
-			URI:         req.ErrorURI,
-		}
-	}
+	redirectURL := config.AuthCodeURL(req.State)
 
 	// check the OAuth code
 	if len(req.Code) == 0 {