finish backend login

backend/global/db.go

@@ -0,0 +1,26 @@
+package global
+
+import (
+	"sync"
+
+	sql "github.com/FloatTech/sqlite"
+)
+
+const (
+	userdbpath = DataFolder + "user.db"
+	filedbpath = DataFolder + "file.db"
+)
+
+type UserDatabase struct {
+	mu sync.RWMutex
+	db sql.Sqlite
+}
+type FileDatabase struct {
+	mu sync.RWMutex
+	db sql.Sqlite
+}
+
+var (
+	UserDB = UserDatabase{db: sql.Sqlite{DBPath: userdbpath}}
+	FileDB = FileDatabase{db: sql.Sqlite{DBPath: filedbpath}}
+)