src/Composer/Util/Svn.php
protected function getCredentialString()
    {
        if (!$this->hasAuth()) {
            return '';
        }

        return sprintf(
            ' %s--username %s --password %s ',
            $this->getAuthCache(),
            ProcessExecutor::escape($this->getUsername()),
            ProcessExecutor::escape($this->getPassword())
        );
    }
protected function getCredentialString()
    {
        if (!$this->hasAuth()) {
            return '';
        }

        return sprintf(
            ' %s--username %s --password %s ',
            $this->getAuthCache(),
            ProcessExecutor::escape($this->getUsername()),
            ProcessExecutor::escape($this->getPassword())
        );
    }
Return the credential string for the svn command.

Adds --no-auth-cache when credentials are present.

@return string