What if you used a yahoo account to create a xbox gamertag and i cant sign in now?

If you're unable to sign in to your Xbox gamertag that was created with a Yahoo account, first ensure you are entering the correct email and passWord. If you've forgotten your passWord, try resetting it through Yahoo's account recovery process. Additionally, check if there are any issues with Yahoo's service that might be affecting your login. If you continue to experience problems, you may need to contact Xbox Support for further assistance.