From 7667fbdb5a71df954d5b5783359b51db5a59360b Mon Sep 17 00:00:00 2001
From: William Martin <williammartin@github.com>
Date: Wed, 29 Nov 2023 17:06:37 +0100
Subject: [PATCH] Handle logout having no candidates

---
 pkg/cmd/auth/logout/logout.go      |  4 +++-
 pkg/cmd/auth/logout/logout_test.go | 11 +++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/pkg/cmd/auth/logout/logout.go b/pkg/cmd/auth/logout/logout.go
index 5077cdae1..a400dfc93 100644
--- a/pkg/cmd/auth/logout/logout.go
+++ b/pkg/cmd/auth/logout/logout.go
@@ -110,7 +110,9 @@ func logoutRun(opts *LogoutOptions) error {
 		}
 	}
 
-	if len(candidates) == 1 {
+	if len(candidates) == 0 {
+		return errors.New("no user accounts matched that criteria")
+	} else if len(candidates) == 1 {
 		hostname = candidates[0].host
 		username = candidates[0].user
 	} else if !opts.IO.CanPrompt() {
diff --git a/pkg/cmd/auth/logout/logout_test.go b/pkg/cmd/auth/logout/logout_test.go
index 57f40a59c..d3bfa6ca2 100644
--- a/pkg/cmd/auth/logout/logout_test.go
+++ b/pkg/cmd/auth/logout/logout_test.go
@@ -240,6 +240,17 @@ func Test_logoutRun_tty(t *testing.T) {
 			},
 			wantErr: "not logged in as unknown-user on ghe.io",
 		},
+		{
+			name: "errors when user is specified but doesn't exist on any host",
+			opts: &LogoutOptions{
+				Username: "unknown-user",
+			},
+			cfgHosts: []hostUsers{
+				{"github.com", []user{"monalisa"}},
+				{"ghe.io", []user{"monalisa"}},
+			},
+			wantErr: "no user accounts matched that criteria",
+		},
 	}
 
 	for _, tt := range tests {