How do I recover my iCloud password and username to transfer my account

User name from old iPhone is found using the steps in this article If you forgot your Apple ID email address or phone number - Apple Support

If Apple ID password is not remembered reset password If you forgot your Apple ID password - Apple Support

The old account information from old phone to new iPhone can be transferred using the steps in the article Use Quick Start to transfer data to a new iPhone, iPad, or iPod touch - Apple Support

TRRobinson1963 Said:

"I would like to transfer my information from my old phone to my new one with my icloud"

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Transferring Photos:

Sync Through iCloud:

Sign in to the same Apple ID on both iPhones, and then enable Photos in iCloud Settings. Being synced, Photos will be accessible between both two iPhones.

On Both iPhones:

1. Click: Settings
2. Tap: your Name (top item)
3. Tap: iCloud
4. Tap: Photos (so that it is green)

Or One One Phone:

If you no longer have this old phone, then perform those steps on the new phone.