Fixed errcheck issues in server/channels/api4/license_test.go (#28557)

server/.golangci.yml

@@ -88,7 +88,6 @@ issues:
         channels/api4/job_test.go|\
         channels/api4/license.go|\
         channels/api4/license_local.go|\
-        channels/api4/license_test.go|\
         channels/api4/oauth_test.go|\
         channels/api4/outgoing_oauth_connection_test.go|\
         channels/api4/plugin.go|\

server/channels/api4/license_test.go

@@ -31,7 +31,8 @@ func TestGetOldClientLicense(t *testing.T) {
 
 	require.NotEqual(t, license["IsLicensed"], "", "license not returned correctly")
 
-	client.Logout(context.Background())
+	_, err = client.Logout(context.Background())
+	require.NoError(t, err)
 
 	_, _, err = client.GetOldClientLicense(context.Background(), "")
 	require.NoError(t, err)