Hi fredrick299,
Welcome to the Apple Community, where some of us do our best to help each other troubleshoot :)
Your Apple ID is the account that you use to access all Apple services, including iCloud:
Sign in with your Apple ID
https://support.apple.com/en-us/HT204053
if you have forgotten the appleID itself :
https://support.apple.com/en-gb/HT201354
How to reset it, if you forgot your Apple ID password:
https://support.apple.com/en-au/HT201487
Or
Recover your Apple ID and / or if you forgot your log-in password
https://iforgot.apple.com/password/verify/appleid
And
If you change your Apple ID or password :
You might need to update your sign-in information with any Apple services that you're using. .
Eg:
What to do after you change your Apple ID or password
https://support.apple.com/en-us/HT204071
Hope this helps you :)