Two Accounts: I have two accounts and I want to merge them

I have two accounts and I want to merge

Account 1: 2 forms 

into Account 2:  sign in

How do I do it 

Greetings,

You can send us a request using the account you don't want to use anymore and provide the username or email address of your second account. Thus, we will move your forms with the submissions data included there.

We're looking forward to your reply;

Thank you in advance!