I forgot my password on one of my accounts that's on icloud

i have two icloud accounts and I want to combine them.

This is not supported by Apple. You can set up Family Sharing to use most iTunes purchases from both accounts on one device.

You can reset the forgotten password at iforgot.apple.com or https://support.apple.com/contact

Family Sharing

Family Sharing -What types of content can I share?

Family Sharing - If you don‘t see your family‘s shared content

Family Sharing - purchases and payments

Family Sharing – share iCloud Storage

Family Sharing and location