edd_login_error_check()
Function: While loading the template, see if an error was set for a filed login attempt and set the proper HTTP status code if there was a failed login attempt.
Source: includes/login-register.php:25
edd_process_login_form()
Function: Process Login Form
Source: includes/login-register.php:92
edd_log_user_in()
Function: Log User In
Source: includes/login-register.php:143