chore: add auth logic

backend/internal/storage/migrations.go

@@ -5,11 +5,12 @@ const CreateSqlite = `
 	id INTEGER PRIMARY KEY AUTOINCREMENT,
 	name TEXT NOT NULL,
 	last_name TEXT NOT NULL,
-	login TEXT NOT NULL,
+	login TEXT NOT NULL UNIQUE,
 	password TEXT NOT NULL,
+	token TEXT NOT NULL UNIQUE,
 	permission_view BOOL NOT NULL,
 	permission_manage_agent BOOL NOT NULL,
-	permission_tokens BOOL NOT NULL
+	permission_admin BOOL NOT NULL
 );
 `