public IEnumerable <user_sign_in_Result> GetUser([FromBody] user_sign_in_Result user) { var ob = db.user_sign_in(user.uid); int count = ob.Count <user_sign_in_Result>(); if (count == 0) { string username = UsernameCreater(user.fullname, user.uid); db.user_sign_up(user.uid, username, user.photourl, user.fullname, System.DateTime.Now); } return(db.user_sign_in(user.uid)); }