Change configuration settings for the connector without rebuilding

I would like to know is there any way where in I can supply configuration settings for custom connector without building the app like a web.config file or settings.json file. Currently, I am reading the same from resource file but this is not ideal solution as for different environments I have to build multiple times and deploy the same.

I am trying something like this

```

xmlTable = Xml.Tables(File.Contents("D:\PowerBi\CustomConnector\settings.xml"));
tenantId = xmlTable[TenantId]{0};
applicationId = xmlTable[ApplicationId]{0};
redirect_uri = xmlTable[RedirectUri]{0};
logout_uri = xmlTable[LogoutUri]{0};

```

But here, rather than absolute URL, I would like to give a relative URL.
Even this approach gets failed with below error:

Login failed.

Details: