You can use a-z, 0-9 and underscores.
Minimum length is 5 characters.
        
        
          69
          
          
        
       
      
      
      
        
  
    
    
    
      
        Možete koristiti a-z, 0-9 i podvlaku.
Mora imati najmanje 5 znakova.
        68/69
       
      
        
        
          
            
            Aki,
            Aug 30, 2023 at 08:22
          
         
       
     
    
   
  
 
  
    
    
    
      
        Možete koristiti a-z, 0-9 i podvlaku_.
Mora imati najmanje 5 znakova.
        61/69
       
      
        
        
          
            
            Nice Giraffe,
            Aug 20, 2020 at 23:45