they use the regular WordPress registration 
which is http://example.com/wp-login.php?action=register
or you can put the bbPress shortcode [bbp-register] into a page for a frontend form 
here is the rest of the supplied shortcodes
https://codex.bbpress.org/shortcodes/
		
	 
	
	
	
 
		
			
	
	
		
		OK, easy enough, but now it says “User registration is currently not allowed.” 
Sorry I’m new to this.
		
	 
	
	
	
 
		
			
	
	
		
		go to the WordPress backend in the menu settings > general 
and then allow registration
		
	 
	
	
	
 
		
			
	
	
		
		where can i find the login option in bbpress?
		
	 
	
	
	
 
		
			
	
	
		
		 @manavforum
again the same as for bbpress – but you can use the bbpress login widget or use
https://wordpress.org/plugins/bbp-style-pack/