Add Config to disable Auth Transfers. (#7843)

* Add Config to disable Auth Transfers.

* Set config ExperimentalEnableAuthenticationTransfer behind an E20 license restriction

utils/config.go

@@ -526,7 +526,6 @@ func getClientConfig(c *model.Config) map[string]string {
 	props["EnableEmojiPicker"] = strconv.FormatBool(*c.ServiceSettings.EnableEmojiPicker)
 	props["RestrictCustomEmojiCreation"] = *c.ServiceSettings.RestrictCustomEmojiCreation
 	props["MaxFileSize"] = strconv.FormatInt(*c.FileSettings.MaxFileSize, 10)
-
 	props["AppDownloadLink"] = *c.NativeAppSettings.AppDownloadLink
 	props["AndroidAppDownloadLink"] = *c.NativeAppSettings.AndroidAppDownloadLink
 	props["IosAppDownloadLink"] = *c.NativeAppSettings.IosAppDownloadLink
@@ -547,6 +546,7 @@ func getClientConfig(c *model.Config) map[string]string {
 	if IsLicensed() {
 		License := License()
 		props["ExperimentalTownSquareIsReadOnly"] = strconv.FormatBool(*c.TeamSettings.ExperimentalTownSquareIsReadOnly)
+		props["ExperimentalEnableAuthenticationTransfer"] = strconv.FormatBool(*c.ServiceSettings.ExperimentalEnableAuthenticationTransfer)
 
 		if *License.Features.CustomBrand {
 			props["EnableCustomBrand"] = strconv.FormatBool(*c.TeamSettings.EnableCustomBrand)