diff --git a/models/login/oauth2.go b/models/login/oauth2.go
index cbc544cd4ead5..45ab59dd78ca8 100644
--- a/models/login/oauth2.go
+++ b/models/login/oauth2.go
@@ -52,7 +52,7 @@ func (err ErrOAuthApplicationNotFound) Error() string {
 // GetActiveOAuth2ProviderLoginSources returns all actived LoginOAuth2 sources
 func GetActiveOAuth2ProviderLoginSources() ([]*Source, error) {
 	sources := make([]*Source, 0, 1)
-	if err := db.DefaultContext().Engine().Where("is_active = ? and type = ?", true, OAuth2).Find(&sources); err != nil {
+	if err := db.GetEngine(db.DefaultContext).Where("is_active = ? and type = ?", true, OAuth2).Find(&sources); err != nil {
 		return nil, err
 	}
 	return sources, nil
@@ -61,7 +61,7 @@ func GetActiveOAuth2ProviderLoginSources() ([]*Source, error) {
 // GetActiveOAuth2LoginSourceByName returns a OAuth2 LoginSource based on the given name
 func GetActiveOAuth2LoginSourceByName(name string) (*Source, error) {
 	loginSource := new(Source)
-	has, err := db.DefaultContext().Engine().Where("name = ? and type = ? and is_active = ?", name, OAuth2, true).Get(loginSource)
+	has, err := db.GetEngine(db.DefaultContext).Where("name = ? and type = ? and is_active = ?", name, OAuth2, true).Get(loginSource)
 	if !has || err != nil {
 		return nil, err
 	}
diff --git a/models/oauth2.go b/models/oauth2.go
deleted file mode 100644
index 7fdd5309fb92b..0000000000000
--- a/models/oauth2.go
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2017 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
-
-package models
-
-import "code.gitea.io/gitea/models/db"
-
-// GetActiveOAuth2ProviderLoginSources returns all actived LoginOAuth2 sources
-func GetActiveOAuth2ProviderLoginSources() ([]*LoginSource, error) {
-	sources := make([]*LoginSource, 0, 1)
-	if err := db.GetEngine(db.DefaultContext).Where("is_active = ? and type = ?", true, LoginOAuth2).Find(&sources); err != nil {
-		return nil, err
-	}
-	return sources, nil
-}
-
-// GetActiveOAuth2LoginSourceByName returns a OAuth2 LoginSource based on the given name
-func GetActiveOAuth2LoginSourceByName(name string) (*LoginSource, error) {
-	loginSource := new(LoginSource)
-	has, err := db.GetEngine(db.DefaultContext).Where("name = ? and type = ? and is_active = ?", name, LoginOAuth2, true).Get(loginSource)
-	if !has || err != nil {
-		return nil, err
-	}
-
-	return loginSource, nil
-}
diff --git a/services/auth/login_source.go b/services/auth/login_source.go
index 476690ff76556..723dd2b1a5d0e 100644
--- a/services/auth/login_source.go
+++ b/services/auth/login_source.go
@@ -12,7 +12,7 @@ import (
 
 // DeleteLoginSource deletes a LoginSource record in DB.
 func DeleteLoginSource(source *login.Source) error {
-	count, err := db.DefaultContext().Engine().Count(&models.User{LoginSource: source.ID})
+	count, err := db.GetEngine(db.DefaultContext).Count(&models.User{LoginSource: source.ID})
 	if err != nil {
 		return err
 	} else if count > 0 {
@@ -21,7 +21,7 @@ func DeleteLoginSource(source *login.Source) error {
 		}
 	}
 
-	count, err = db.DefaultContext().Engine().Count(&models.ExternalLoginUser{LoginSourceID: source.ID})
+	count, err = db.GetEngine(db.DefaultContext).Count(&models.ExternalLoginUser{LoginSourceID: source.ID})
 	if err != nil {
 		return err
 	} else if count > 0 {
@@ -36,6 +36,6 @@ func DeleteLoginSource(source *login.Source) error {
 		}
 	}
 
-	_, err = db.DefaultContext().Engine().ID(source.ID).Delete(new(login.Source))
+	_, err = db.GetEngine(db.DefaultContext).ID(source.ID).Delete(new(login.Source))
 	return err
 }