Click on website's top most right button named "Join or Login". Also, you can see the "Join or Login" on home page.
(Choose profile-type "individual" or "non-individual
For adding content in the website, you must sign-up.
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You may take help from the forum regarding sign-up https://researchpeers.com/forum/topic/How-to-join-or-login-and-add-content.htm
Adding event procedure
Login with your username (or E-mail id) and password.