Invalid Apple ID when logging in
my apple id is invalid when i was trying to login
If you see this on your Apple device, it might be, that a different Apple Account has been used to set up the device or download purchases onto the device.
There are multiple ways to find out, which Apple Account has been used, have a look at the related article:
If you forgot your Apple Account primary email address or phone number - Apple Support
If this does not work, give the official Apple Support a call by selecting the phone number for your region from this Apple Support page: