<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def store_password_in_keyring(credential_id, username, password=None):
    '''
    Interactively prompts user for a password and stores it in system keyring
    '''
    try:
        # pylint: disable=import-error
        import keyring
        import keyring.errors
        # pylint: enable=import-error
        if password is None:
            prompt = 'Please enter password for {0}: '.format(credential_id)
            try:
                password = getpass.getpass(prompt)
            except EOFError:
                password = None

            if not password:
                # WE should raise something else here to be able to use this
                # as/from an API
                raise RuntimeError('Invalid password provided.')

        try:
            _save_password_in_keyring(credential_id, username, password)
        except keyring.errors.PasswordSetError as exc:
            log.debug('Problem saving password in the keyring: %s', exc)
    except ImportError:
        log.error('Tried to store password in keyring, but no keyring module is installed')
        return False