I try the sample code, but error, System.Exception:“The IPFS_PASS environement variable is missing.”

[billqu01]

My code:
private async void GetData()
{
var ipfs = new IpfsEngine();

        const string filename = "QmS4ustL54uo8FzR9455qaxZwuMiUhyvMcX9Ba8nUH4uVv/about";
        string text = await ipfs.FileSystem.ReadAllTextAsync(filename);
    }

when run at var ipfs = new IpfsEngine();
the error throw,
System.Exception:“The IPFS_PASS environement variable is missing.”

How should I do?
Thank you very much.

[Myina]

This occurs when you instantiate the IPFS engine without any arguments. It would expect to read the pass phrase from the system environment in Advanced System Settings > Advanced > Environment Variables > System Variables (on Windows). You can add a pass phrase with a variable name "IPFS_PASS" or use the constructor supporting a SecureString() as shown below.

_engine = new IpfsEngine(new SecureString())
          {
              Options = options
          };