I have my imei but forgot my Apple ID
Forgot Apple ID and password
Forgot Apple ID and password
iCloud uses Apple ID credentials.
If you do not remember the Apple ID Password then follow the steps given in this Apple Article -> If you forgot your Apple ID password - Apple Support
If you do not remember the Apple ID then follow the steps given in this Apple Article -> If you forgot your Apple ID - Apple Support

If you are the owner or the owner has shared all information with you then to open Activation Lock:- If it is Activation locked, read here --> Turn off Activation Lock - Apple Support Activation Lock for iPhone, iPad, and iPod touch - Apple Support
Learn how to remove a device from a previous owner's account.
If you are not the owner and do not have the Apple ID and Password then there is no way that you can get into this iPhone unless the original owner shares the Apple ID and password with you. If you are lucky you can get into this iPhone if they (owner) accidentally remove the device from their Apple ID.

iCloud uses Apple ID credentials.
If you do not remember the Apple ID Password then follow the steps given in this Apple Article -> If you forgot your Apple ID password - Apple Support
If you do not remember the Apple ID then follow the steps given in this Apple Article -> If you forgot your Apple ID - Apple Support

If you are the owner or the owner has shared all information with you then to open Activation Lock:- If it is Activation locked, read here --> Turn off Activation Lock - Apple Support Activation Lock for iPhone, iPad, and iPod touch - Apple Support
Learn how to remove a device from a previous owner's account.
If you are not the owner and do not have the Apple ID and Password then there is no way that you can get into this iPhone unless the original owner shares the Apple ID and password with you. If you are lucky you can get into this iPhone if they (owner) accidentally remove the device from their Apple ID.

Your Apple ID is your email address. Did you really forget your email address? And you logged in to this forum using your Apple ID. Your IMEI is the hardware ID of your phone; it is unrelated to your Apple ID.
To be straight forward your IMEI is useless in recovering anything.
Please start another new post. Your request has nothing to do with the topic of this thread.
I want my iOS to be updated
I have my imei but forgot my Apple ID