human
Solve the following python programming problem given the following code:
def database_settings(database_name) : 
    class_name = (database_name.capitalize () + 'DatabaseSettings') 
    global_vars = globals () 
    if (class_name in global_vars) : 
        return global_vars [class_name] 
class DatabaseSettings (bases.Hashable, bases.Representable, bases.ConstructableFromDict) : 
        class Schema (marshmallow.Schema) : 
            host = fields.String (missing = 'localhost') 
            port = fields.Integer (missing = 3306) 
            username = fields.String (missing = database_name) 
            password = fields.String () 
            database = fields.String (missing = database_name) 
            @ marshmallow.post_load 
            def to_cloud(self, data) : 
                return DatabaseSettings (data) 
DatabaseSettings.__name__ = class_name 
    global_vars [global_vars] = DatabaseSettings 
    return DatabaseSettings 

    
    

    Fix the buggy line: global_vars [global_vars] = DatabaseSettings
assistant
#Here is Python code to fix the buggy line: global_vars [global_vars] = DatabaseSettings
.

global_vars [class_name] = DatabaseSettings