Use of Hard-coded Password (CWE ID 259) C#

Question

I'm using a piece of code related to the HttpClient in C# so passing some of the value as a parameter like:

var httpResponse = await this.httpClient.GetAsync(new Uri("https://api.vimeo.com/me/albums/" + playListID + "/videos?access_token=" + this.GetVimeoAccessToken(clientId, clientSecret)));

Getting the issue Use of Hard-coded Password (CWE ID 259) after the vera code scan.

So please guide how I handle the Hard-Coded Password issue.