How to merge all your badges from different account to one account in Salesforce Trailhead?

To merge all your badges from different account to one account in Salesforce Trailhead, check the below link

https://force.desk.com/customer/portal/articles/2418878-merging-trailhead-accounts?b_id=13478

Note:
Make sure you have the usernames of the accounts which are to be merged.

Cheers!!!