How can I take back my Administration password?

I have just set up a forum on forumvi, the link is here: https://bienkichvn2020.forumvi.com/

After setting up a forum, I encountered a problem that when I tried to log back into the Admin's nick, I forgot my password. and cannot log in again. I have found out on the forum that if you want to re-enter, you must use the account finder tool but ironically I forgot even the original password of the forum. Please ask me now what to do? One way to do that is to upload enough 50 posts to send you a message, but if you've been marked as spam then I don't know when I'll get the forum back, please help me!

I would appreciate it if I could help from the community.
*Also sorry is my English are tô bad because I am a Vietnamese, so I dont well much in English, anh I AM NOT CHINESE, PLEASE REMEMBER THAT!"

hello

please send me only by private message the email you used to create the forum and the founder's nickname

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