diff --git a/core/maingate.go b/core/maingate.go
index 7131a91..d55b2e3 100644
--- a/core/maingate.go
+++ b/core/maingate.go
@@ -587,6 +587,7 @@ func (mg *Maingate) setUserToken(info usertokeninfo) error {
 			"lastupdate":              time.Now().Unix(),
 			"accesstoken":             info.accesstoken,
 			"accesstoken_expire_time": info.accesstoken_expire_time,
+			"email":                   info.email,
 		},
 	}, options.Update().SetUpsert(true))
 	return logger.ErrorWithCallStack(err)
@@ -639,6 +640,11 @@ func (mg *Maingate) getUserTokenWithCheck(platform string, userid string, brinfo
 			info.accesstoken_expire_time = accesstoken_expire_time.(int64)
 		}
 
+		email := found["email"]
+		if email != nil {
+			info.email = email.(string)
+		}
+
 		return info, nil
 	}
 
@@ -676,6 +682,10 @@ func (mg *Maingate) updateUserinfo(info usertokeninfo) (bool, string, string) {
 		return false, "", ""
 	}
 
+	if !(strings.HasPrefix("email", "__dummy_") && strings.HasSuffix("email", "temp__")) {
+		info.email = email
+	}
+
 	mg.setUserToken(info)
 
 	return success, userid, email
diff --git a/core/platformapple.go b/core/platformapple.go
index dc9daa9..c8a0370 100644
--- a/core/platformapple.go
+++ b/core/platformapple.go
@@ -255,6 +255,7 @@ func (mg *Maingate) platform_apple_authorize_result(w http.ResponseWriter, r *ht
 		info.userid = userid
 		info.token = resp.RefreshToken
 		info.brinfo = brinfo
+		info.email = email
 
 		mg.setUserToken(info)
 		params := url.Values{}
diff --git a/core/platformfirebaseauth.go b/core/platformfirebaseauth.go
index 5741818..abc2d46 100644
--- a/core/platformfirebaseauth.go
+++ b/core/platformfirebaseauth.go
@@ -208,6 +208,7 @@ func (mg *Maingate) platform_firebaseauth_authorize_raw(w http.ResponseWriter, b
 		info.brinfo = brinfo
 		info.accesstoken = ""
 		info.accesstoken_expire_time = acceestoken_expire_time
+		info.email = email
 		mg.setUserToken(info)
 
 		mg.mongoClient.Delete(CollectionFirebaseUserInfo, bson.M{
diff --git a/core/platformgoogle.go b/core/platformgoogle.go
index 10d6013..3a58f5a 100644
--- a/core/platformgoogle.go
+++ b/core/platformgoogle.go
@@ -262,6 +262,7 @@ func (mg *Maingate) platform_google_authorize_result(w http.ResponseWriter, r *h
 		info.brinfo = brinfo
 		info.accesstoken = respReferesh.AccessToken
 		info.accesstoken_expire_time = acceestoken_expire_time
+		info.email = email
 		mg.setUserToken(info)
 
 		params := url.Values{}
@@ -316,6 +317,7 @@ func (mg *Maingate) platform_google_getuserinfo(info usertokeninfo) (bool, strin
 				info.token = respReferesh.RefreshToken
 				info.accesstoken = respReferesh.AccessToken
 				info.accesstoken_expire_time = acceestoken_expire_time
+				info.email = email
 				mg.setUserToken(info) //-- accesstoken 업데이트
 			} else {
 				logger.Println("JWTparseCode fail.")
diff --git a/core/platformmicrosoft.go b/core/platformmicrosoft.go
index 3375905..b444692 100644
--- a/core/platformmicrosoft.go
+++ b/core/platformmicrosoft.go
@@ -239,6 +239,7 @@ func (mg *Maingate) platform_microsoft_authorize_result(w http.ResponseWriter, r
 		info.brinfo = brinfo
 		info.accesstoken = respReferesh.AccessToken
 		info.accesstoken_expire_time = acceestoken_expire_time
+		info.email = ""
 		mg.setUserToken(info)
 
 		params := url.Values{}
@@ -295,6 +296,7 @@ func (mg *Maingate) platform_microsoft_getuserinfo(info usertokeninfo) (bool, st
 				info.token = respReferesh.RefreshToken
 				info.accesstoken = respReferesh.AccessToken
 				info.accesstoken_expire_time = acceestoken_expire_time
+				info.email = ""
 				mg.setUserToken(info) //-- accesstoken 업데이트
 			} else {
 				logger.Println("JWTparseCode fail.")
diff --git a/core/platformsteam.go b/core/platformsteam.go
index bcdd229..4c3b602 100644
--- a/core/platformsteam.go
+++ b/core/platformsteam.go
@@ -53,6 +53,7 @@ func (mg *Maingate) platform_steamsdk_authorize(w http.ResponseWriter, r *http.R
 		info.brinfo = brinfo
 		//info.accesstoken = respReferesh.AccessToken
 		info.accesstoken_expire_time = acceestoken_expire_time
+		info.email = ""
 		mg.setUserToken(info)
 
 		params := url.Values{}
diff --git a/core/platformtwitter.go b/core/platformtwitter.go
index 58396c5..a10017a 100644
--- a/core/platformtwitter.go
+++ b/core/platformtwitter.go
@@ -208,6 +208,7 @@ func (mg *Maingate) platform_twitter_authorize_result(w http.ResponseWriter, r *
 		info.token = token
 		info.secret = secret
 		info.brinfo = brinfo
+		info.email = ""
 
 		mg.setUserToken(info)
 		params := url.Values{}
diff --git a/core/service.go b/core/service.go
index 1389d95..e0b911a 100644
--- a/core/service.go
+++ b/core/service.go
@@ -63,6 +63,7 @@ type usertokeninfo struct {
 	token                   string //refreshtoken
 	secret                  string
 	brinfo                  string
+	email                   string
 	accesstoken             string // microsoft only
 	accesstoken_expire_time int64  // microsoft only
 }