crear un login y archivos Json

def create_login(user, password):
    #this function creates a login and json file
    #with the information provided
    
    import json
    
    f = open(str(user)+'.json','w')
    
    dict = {}
    
    dict['user'] = user
    dict['password'] = password
    
    json.dump(dict, f)
    
    f.close()
    
create_login('juan', '1234')